Sun, Z., Wang, Q., Douglas, J. F., Fedorov, A. V., Rotenberg, E., ...
In correlated electron systems such as cuprate superconductors and colossal magnetoresistive (CMR) oxides there is often a tendency for a nanoscale self-organization of electrons that can give rise...
Continuous metal-insulator transition of the antiferromagnetic perovskite NaOsO3 (2009)
Shi, Y. G., Guo, Y. F., Yu, S., Arai, M., Belik, A. A., Sato, A., ...
Newly synthesized perovskite NaOsO3 shows Curie-Weiss metallic nature at high temperature and suddenly goes into an antiferromagnetically insulating state at 410 K on cooling. Electronic specific...
Varga, T., Kumar, A., Vlahos, E., Denev, S., Park, M., Hong, S., ...
We report the magnetic and electrical characteristics of a polycrystalline specimen of FeTiO3 synthesized at high pressure that is isostructural with acentric LiNbO3 (LBO). Piezoresponse force...
Magnetic correlations in YBaCo4O7 probed by single-crystal neutron scattering (2009)
Manuel, P., Chapon, L. C., Radaelli, P. G., Zheng, H., Mitchell, J. F.
We have studied the frustrated system YBaCo4O7 generally described as an alternating stacking of Kagome and triangular layers of magnetic ions on a trigonal lattice, by single crystal neutron...
Local Structure of La1-xSrxCoO3 determined from EXAFS and neutron PDF studies (2009)
Sundaram, N., Jiang, Y., Anderson, I. E., Belanger, D. P., Booth, C. H., Bridges, F., ...
The combined local structure techniques, extended x-ray absorption fine structure (EXAFS) and neutron pair distribution function analysis, have been used for temperatures 4
Weber, F., Aliouane, N., Zheng, H., Mitchell, J.F., Argyriou, D.N., Reznik, D.
Nature Materials, 8(2009) S.798-802
Bilayer splitting and c-axis coupling in CMR bilayer manganites (2008)
Jozwiak, C., Graf, J., Zhou, S. Y., Bostwick, A., Rotenberg, E., Zheng, H., ...
By performing angle-resolved photoemission spectroscopy of the bilayer colossal magnetoresistive (CMR) manganite, $La_{2-2x}Sr_{1+2x}Mn_{2}O_{7}$, we provide the first complete mapping of the Fermi...
Mannella, N., Yang, W. L., Tanaka, K., Zhou, X. J., Zheng, H., Mitchell, J. F., ...
Angle-resolved photoemission spectroscopy data for the bilayer manganite La1.2Sr1.8Mn2O7 show that, upon lowering the temperature below the Curie point, a coherent polaronic metallic groundstate...
Characteristic Energy of the Coulomb Interactions and the Pileup of States (2007)
Mazur, Daniel, Gray, K. E., Zasadzinski, J. F., Ozyuzer, L., Beloborodov, I. S., Zheng, H., ...
Tunneling data on $\mathrm{La_{1.28}Sr_{1.72}Mn_2O_7}$ crystals confirm Coulomb interaction effects through the $\sqrt{\mathrm{E}}$ dependence of the density of states. Importantly, the data and...
Surface effects on the orbital order in the single layered manganite La0.5Sr1.5MnO4 (2007)
Wakabayashi, Y., Upton, M. H., Grenier, S., Hill, J. P., Nelson, C. S., ...
We report the first observation of `orbital truncation rods' -- the scattering arising from the termination of bulk orbital order at the surface of a crystal. The x-ray measurements, performed on a...
Reentrant Orbital Order and the True Ground State of LaSr2Mn2O7 (2007)
Li, Qing'An, Gray, K. E., Zheng, H., Claus, H., Rosenkranz, S., Ancona, S. Nyborg, ...
Contrary to conventional wisdom, our purified La2-2xSr1+2xMn2O7 crystals exhibit CE-type orbital and charge order as the low-temperature ground state for a hole doping level h = 0.5. For small...
Surface effects on the orbital order in the single layered manganite La0.5 Sr1.5 MnO4 (2007)
Wakabayashi, Yusuke, Upton, M. H., Grenier, Stéphane, P. Hill, J., Nelson, C. S., Kim, J. W., ...
We report the first observation of orbital truncation rods' the scattering arising from the termination of bulk orbital order at the surface of a crystal. The x-ray measurements, performed on a...
Surface effects on the orbital order in the single layered manganite La0.5 Sr1.5 MnO4 (2007)
Wakabayashi, Yusuke, Upton, M. H., Grenier, Stéphane, P. Hill, J., Nelson, C. S., Kim, J. W., ...
We report the first observation of orbital truncation rods' the scattering arising from the termination of bulk orbital order at the surface of a crystal. The x-ray measurements, performed on a...
Suppressed Magnetization at the Surfaces and Interfaces of Ferromagnetic Metallic Manganites (2006)
Freeland, J. W., Kavich, J. J., Gray, K. E., Ozyuzer, L., Zheng, H., Mitchell, J. F., ...
What happens to ferromagnetism at the surfaces and interfaces of manganites? With the competition between charge, spin, and orbital degrees of freedom, it is not surprising that the surface behavior...
Sun, Z., Douglas, J. F., Fedorov, A. V., Zheng, H., Mitchell, J. F., ...
Angle-resolved photoemission spectroscopy was used to investigate the evolution of the electronic structure across the metal-insulator transition in bi-layer manganite $La_{1.24}Sr_{1.76}Mn_2O_7$. We...
Bozin, E. S., Schmidt, M., DeConinck, A. J., Paglia, G., Mitchell, J. F., Chatterji, T., ...
The detailed evolution of the magnitude of the local Jahn-Teller (JT) distortion in La_{1-x} Ca_x Mn O_3 is obtained across the phase diagram for 0 < x < 0.5 from high quality neutron diffraction...
Non-collinear long-range magnetic ordering in HgCr2S4 (2006)
Chapon, L. C., Radaelli, P. G., Hor, Y. S., Telling, M. T. F., Mitchell, J. F.
The low-temperature magnetic structure of \HG has been studied by high-resolution powder neutron diffraction. Long-range incommensurate magnetic order sets in at T$_N\sim$22K with propagation vector...
Competing magnetic interactions in the extended Kagome system YBaCo4O7 (2006)
Chapon, L. C., Radaelli, P. G., Zheng, H., Mitchell, J. F.
YBaCo4O7 belongs to a new class of geometrically frustrated magnets like the pyrochlores, in which Co-spins occupy corners of tetrahedra. The structure can be viewed as an alternating stacking of...
Sun, Z., Chuang, Y.D., Fedorov, A.V., Douglas, J.F., Reznik, D., Weber, F., ...
Physical Review Letters, 97(2006) S.056401/1-4
Nano-magnetic droplets and implications to orbital ordering in La1-xSrxCoO3 (2005)
Phelan, D., Louca, Despina, Rosenkranz, S., Qiu, Y., Chupas, P. J., ...
Inelastic cold neutron scattering on LaCoO3 provided evidence for a distinct low energy excitation at 0.6 meV coincident with the thermally induced magnetic transition. Coexisting strong...
Evidence of Orbital Ordering in Jahn-Teller Undistorted LaSr$_{2}$Mn$_{2}$O$_{7}$ (2005)
Wilkins, S. B., Stojic, N., Beale, T. A. W., Binggeli, N., Bencok, P., Stanescu, S., ...
Resonant soft x-ray diffraction has been used to probe the orbital and magnetic structure of LaSr$_2$Mn$_2$O$_7$ at low temperatures. Previous crystallographic studies have shown that this material...
Nodal quasiparticle in pseudogapped colossal magnetoresistive manganites (2005)
Mannella, N., Yang, W., Zhou, X. J., Zheng, H., Mitchell, J. F., Zaanen, J., ...
A characteristic feature of the copper oxide high-temperature superconductors is the dichotomy between the electronic excitations along the nodal (diagonal) and antinodal (parallel to the Cu-O bonds)...
Sun, Z., Fedorov, A. V., Douglas, J. F., Reznik, D., Weber, F., ...
Using Angle-Resolved Photoemission (ARPES), we present the first observation of sharp quasiparticle-like peaks in a CMR manganite. We focus on the ($\pi$,0) regions of k-space and study their...
Freitas, R. S., Mitchell, J. F., Schiffer, P.
We have studied the low-frequency dielectric properties of the phase-separated manganite Pr0.7Ca0.3MnO3 as a function of applied magnetic field in the low temperature phase-separated state. The...
Extracting d-orbital occupancy from magnetic Compton scattering in bilayer manganites (2005)
Barbiellini, B., Mijnarends, P. E., Kaprzyk, S., Bansil, A., Li, Yinwan, Mitchell, J. F., ...
We consider the shape of the magnetic Compton profile (MCP), $J_{mag}(p_z)$, in La$_{1.2}$Sr$_{1.8}$Mn$_2$O$_7$ for momentum transfer $p_z$ along the [110] direction and the associated reciprocal...
Freeland, J. W., Gray, K. E., Ozyuzer, L., Berghuis, P., Badica, Elvira, Kavich, J., ...
Transmission of information using the spin of the electron as well as its charge requires a high degree of spin polarization at surfaces. At surfaces however this degree of polarization can be...
Mijnarends, P. E., Kaprzyk, S., Barbiellini, B., Bansil, A., Li, Yinwan, Mitchell, J. F., ...
We have carried out first principles, all-electron computations of the magnetic momentum density $\rho_{mag}({\mathbf p})$ and magnetic Compton profiles (MCPs) for momentum transfer along the [100],...
Nodal quasiparticle in pseudogapped colossal magnetoresistive manganites (2005)
Mannella, N., Yang, W.L., Zhou, X.J., Zheng, H., Mitchell, J.F., Zaanen, J., ...
Nodal quasiparticle in pseudogapped colossal magnetoresistive manganites (2005)
Mannella, N., Yang, W.L., Zhou, X.J., Zheng, H., Mitchell, J.F., Zaanen, J., ...
Evidence of Orbital Ordering in Jahn-Teller Undistorted LaSr$_{2}$Mn$_{2}$O$_{7}$ (2004)
Wilkins, S. B., Stojic, N., Beale, T. A. W., Binggeli, N., Bencok, P., Stanescu, S., ...
Resonant soft x-ray diffraction has been used to probe the temperature dependent orbital and magnetic structure of $\mathrm{LaSr_{2}Mn_{2}O_7}$. Previous crystallographic studies have shown that this...
Neutron diffraction study of average and local structure in La0.5Ca0.5MnO3 (2004)
Rodriguez, E. E., Proffen, Th., Llobet, A., Rhyne, J. J., Mitchell, J. F.
We used neutron powder diffraction to obtain the local and long-range structure of La0.5Ca0.5MnO3 at room temperature and 20K. By combining Rietveld and pair distribution function analysis of the...
Li, Yinwan, Montano, P. A., Mitchell, J. F., Barbiellini, B., Mijnarends, P. E., Kaprzyk, S., ...
We have measured temperature-dependent magnetic Compton profiles (MCPs) from a single crystal of La$_{1.2}$Sr$_{1.8}$Mn$_2$O$_7$. The MCPs, which involved the scattering of circularly polarized...
Orbital correlations in the pseudo-cubic \emph{O} and rhombohedral ${R}$-phases of LaMnO$_3$ (2004)
Qiu, Xiangyun, Proffen, Th., Mitchell, J. F., Billinge, S. J. L.
The local and intermediate structure of stoichiometric LaMnO$_3$ has been studied in the pseudocubic and rhombohedral phases at high temperatures (300 to 1150 K). Neutron powder diffraction data were...
Woodward, F. M., Lynn, J. W., Stone, M. B., Mahendiran, R., Schiffer, P., Mitchell, J. F., ...
Perovskite manganite compounds such as Pr_(1-x)(Ca_(1-y)Sr_y)_xMn3 can be tuned to exhibit a metastable ground state where two magnetic/crystallographic phases coexist in zero magnetic field....
Evidence of Orbital Ordering in Jahn-Teller Undistorted LaSr$_{2}$Mn$_{2}$O$_{7}$ (2004)
Wilkins, S. B., Stojic, N., Beale, T. A. W., Binggeli, N., Bencok, P., Stanescu, S., ...
Resonant soft x-ray diffraction has been used to probe the orbital and magnetic structure of LaSr$_2$Mn$_2$O$_7$ at low temperatures. Previous crystallographic studies have shown that this material...
Evidence of Orbital Ordering in Jahn-Teller Undistorted LaSr$_{2}$Mn$_{2}$O$_{7}$ (2004)
Wilkins, S. B., Stojic, N., Beale, T. A. W., Binggeli, N., Bencok, P., Stanescu, S., ...
Resonant soft x-ray diffraction has been used to probe the orbital and magnetic structure of LaSr$_2$Mn$_2$O$_7$ at low temperatures. Previous crystallographic studies have shown that this material...
Spin freezing and magnetic inhomogeneities in bilayer manganites (2003)
Coldea, A. I., Blundell, S. J., Steer, C. A., Mitchell, J. F., Pratt, F. L.
We have performed a muon spin rotation study on polycrystalline samples of electron-doped layered manganites, La$_{2-2x}$Sr$_{1+2x}$Mn$_2$O$_7$ (0.4< x
Changes of the spin dynamics in perovskite and bilayer manganite (2003)
Coldea, A I, Blundell, S J, Steer, C A, Pratt, F L, Prabhakaran, D, Mitchell, J F
Polaronic orbital polarization in a layered colossal magnetoresistive manganite (2003)
Campbell, B. J., Sinha, S. K., Osborn, R., Rosenkranz, S., Mitchell, J. F., Argyriou, D. N., ...
This version is available at the following Publisher URL: http://prb.aps.org
Martinho, H., Rettori, C., Huber, D. L., Oseroff, S. B., Mitchell, J. F.
We have studied the low-temperature behavior of the magnetization and the specific heat of the bilayered perovskite system $% La_{2-2x}Sr_{1+2x}Mn_{2}O_{7}$, for $0.30\leq x\leq 0.50$. Our analysis...
Ultra-sharp magnetization steps in perovskite manganites (2002)
Mahendiran, R., Maignan, A., Hebert, S., Martin, C., Hervieu, M., Raveau, B., ...
We report a detailed study of step-like metamagnetic transitions in the magnetization and resistivity of polycrystalline Pr0.5Ca0.5Mn0.95Co0.05O3. The steps have a sudden onset below a critical...
Kim, D., Revaz, B., Zink, B. L., Hellman, F., Rhyne, J. J., Mitchell, J. F.
We report the doping dependence of the order of the ferromagnetic metal to paramagnetic insulator phase transition in La1-xCaxMnO3. At x = 0.33, magnetization and specific heat data show a first...
Blake, G. R., Chapon, L., Radaelli, P. G., Argyriou, D. N., Gutmann, M. J., Mitchell, J. F.
The phase diagram of Pr0.65(CaySr1-y)0.35MnO3, 0.6
Glass Transition in the Polaron Dynamics of CMR Manganites (2002)
Argyriou, D. N., Lynn, J. W., Osborn, R., Campbell, B., Mitchell, J. F., Ruett, U., ...
Neutron scattering measurements on a bilayer manganite near optimal doping show that the short-range polarons correlations are completely dynamic at high T, but then freeze upon cooling to a...
Spin freezing and magnetic inhomogeneities in bilayer manganites (2002)
Coldea, A I, Blundell, S J, Steer, C A, Mitchell, J F, Pratt, F L
The Structure of Nanoscale Polaron Correlations in La1.2Sr1.8Mn2O7 (2001)
Campbell, B. J., Osborn, R., Argyriou, D. N., Vasiliu-Doloc, L., Mitchell, J. F., Sinha, S. K., ...
A system of strongly-interacting electron-lattice polarons can exhibit charge and orbital order at sufficiently high polaron concentrations. In this study, the structure of short-range polaron...
Low Temperature Magnetothermodynamics of Pr{0.7}Ca{0.3}MnO{3} (2001)
Roy, M., Mitchell, J. F., Ramirez, A. P., Schiffer, P.
We present a detailed magnetothermal study of Pr$_{0.7}$Ca$_{0.3}$MnO$_{3}$, a perovskite manganite in which an insulator-metal transition can be driven by magnetic field, but also by pressure,...
Mesoscopic and microscopic phase segregation in manganese perovskites (2001)
Radaelli, P G, Ibberson, R M, Argyriou, D N, Casalta, H, Andersen, K H, Cheong, S-W, ...
Vasiliu-Doloc, L., Osborn, R., Rosenkranz, S., Mesot, J., Mitchell, J. F., Sinha, S. K., ...
This version is available at the following Publisher URL: http://jap.aip.org
Phase Separation and the Low-Field Bulk Magnetic Properties of Pr0.7Ca0.3MnO3 (2000)
Deac, I. G., Mitchell, J. F., Schiffer, P.
We present a detailed magnetic study of the perovskite manganite Pr0.7Ca0.3MnO3 at low temperatures including magnetization and a.c. susceptibility measurements. The data appear to exclude a...
Ling, C. D., Millburn, J. E., Mitchell, J. F., Bordallo, H. N.
The crystallographic and magnetic phase diagram of the n=2 layered manganite La2-2xSr1+2xMn2O7 in the region x=>0.5 has been studied using temperature dependent neutron powder diffraction. The...
Competition of charge, orbital, and ferromagnetic correlations in layered manganites (2000)
Romero, D. B., Moritomo, Y., Mitchell, J. F., Drew, H. D.
The competition of charge, orbital, and ferromagnetic interactions in layered manganites is investigated by magneto-Raman scattering spectroscopy. We find that the colossal magnetoresistance effect...
Mesoscopic and Microscopic Phase Segregation in Manganese Perovskites (2000)
Radaelli, P. G., Ibberson, R. M., Argyriou, D. N., Casalta, H., Andersen, K. H., ...
Mesoscopic (500-2000 Angstrom) and microscopic (5-20 Angstrom) phase segregation with temperature and magnetic field was studied in the model manganite Pr0.7Ca0.3MnO3 by high-resolution neutron...
Field Dependent Specific-Heat of Rare Earth Manganites (2000)
Roy, M., Mitchell, J. F., Potashnik, S. J., Schiffer, P.
The low temperature specific heat C(H) of several rare-earth manganites (La_(0.7)Sr_(0.3)MnO_(3), Nd_(0.5)Sr_(0.5)MnO_(3), Pr_(0.5)Sr_(0.5)MnO_(3), La_(0.67)Ca_(0.33)MnO$_(3),...
Time Dependent Effects and Transport Evidence for Phase Separation in La_{0.5}Ca_{0.5}MnO_{3} (2000)
Roy, M., Mitchell, J. F., Schiffer, P.
The ground state of La_{1-x}Ca_{x}MnO_{3} changes from a ferromagnetic metallic to an antiferromagnetic charge-ordered state as a function of Ca concentration at x ~ 0.50. We present evidence from...
Soft spin waves in the low temperature thermodynamics of Pr_{0.7}Ca_{0.3}MnO_{3} (2000)
Roy, M., Mitchell, J. F., Ramirez, A. P., Schiffer, P.
We present a detailed magnetothermal study of Pr(0.7)Ca(0.3)MnO(3), a perovskite manganite in which an insulator-metal transition can be driven by magnetic field, but also by pressure, visible light,...
Rosenkranz, S., Osborn, R., Vasiliu-Doloc, L., Lynn, J. W., Sinha, S. K., Mitchell, J. F.
The spin correlations of the bilayer manganite $La_{1.2}Sr_{1.8}Mn_{2}O_{7}$ have been studied using neutron scattering. On cooling within the paramagnetic state, we observe purely two-dimensional...
Charge melting and polaron collapse in $La_{1.2}Sr_{1.8}Mn_{2}O_{7}$ (1999)
Vasiliu-Doloc, L., Rosenkranz, S., Osborn, R., Sinha, S. K., Lynn, J. W., Mesot, J., ...
X-ray and neutron scattering measurements directly demonstrate the existence of polarons in the paramagnetic phase of optimally-doped colossal magnetoresistive oxides. The polarons exhibit...
Lattice Displacements Above Tc in the Layered Manganite La1.2Sr1.8Mn2O7 (1999)
Argyriou, D. N., Bordallo, H. N., Mitchell, J. F., Jorgensen, J. D., Strouce, G. F.
Neutron diffraction data presented in this paper demonstrates the relevance of lattice displacement above TC, in our understanding of the evolution of the crystal structure with temperature in the...
Welp, U., Berger, A., Miller, D. J., Vlasko-Vlasov, V. K., Gray, K. E., Mitchell, J. F.
Magnetic field induced transitions in the antiferromagnetic layered manganite La1.4Sr1.6Mn2O7 were studied using magnetization measurements and a high-resolution magneto-optical imaging technique. We...
Li, Q. A., Gray, K. E., Mitchell, J. F., Berger, A., Osgood, R.
Experimental evidence supports the double-exchange (DE) mechanism for both in-plane and c-axis conductivity in the colossal-magnetoresistive (CMR) layered manganite La1.4Sr1.6Mn2O7. Below TC, the...
Structure and magnetism in the layered CMR manganites La2-2xSr1+2xMn2O7 (x=0.3, 0.4) (1999)
Argyriou, D N, Mitchell, J F, Jorgensen, J D, Goodenough, J B, Radaelli, P G, Cox, D E, ...
Osborn, R., Rosenkranz, S., Argyriou, D. N., Vasiliu-Doloc, L., Lynn, J. W., Sinha, S. K., ...
Neutron scattering investigations of the paramagnetic correlations in the layered manganite La$_{1.2}$Sr$_{1.8}$Mn$_{2}$O$_{7}$, which exhibits colossal magnetoresistance above the Curie transition...
Crossland, J., Mitchell, J. F., Woodruff, G. N.
1. Ergothioneine has been detected and quantitatively estimated in the brains of mice, rats, guinea-pigs, rabbits, cats and sheep. It is present in the cerebellum in amounts ranging from about 3·0...
The central release of acetylcholine during stimulation of the visual pathway
1. In rabbits anaesthetized with Dial ACh has been collected from the surface of the cerebral cortex during stimulation of the visual pathways.
The release of γ-aminobutyric acid during inhibition in the cat visual cortex
Iversen, L. L., Mitchell, J. F., Srinivasan, Vasanta
1. The release of γ-aminobutyric acid (GABA) from the surface of the posterior lateral gyrus of the cerebral cortex was measured by a sensitive enzymic fluorimetric assay procedure. Experiments were...
The central release of acetylcholine during consciousness and after brain lesions
1. Acetylcholine (ACh) has been collected from the visual cortex of anaesthetized rabbits during stimulation of the lateral geniculate body and after cutting central nervous pathways. ACh has also...
Crossland, J., Mitchell, J. F., Woodruff, G. N.
1. Ergothioneine has been detected and quantitatively estimated in the brains of mice, rats, guinea-pigs, rabbits, cats and sheep. It is present in the cerebellum in amounts ranging from about 3·0...
The central release of acetylcholine during stimulation of the visual pathway
1. In rabbits anaesthetized with Dial ACh has been collected from the surface of the cerebral cortex during stimulation of the visual pathways.
The release of γ-aminobutyric acid during inhibition in the cat visual cortex
Iversen, L. L., Mitchell, J. F., Srinivasan, Vasanta
1. The release of γ-aminobutyric acid (GABA) from the surface of the posterior lateral gyrus of the cerebral cortex was measured by a sensitive enzymic fluorimetric assay procedure. Experiments were...
The central release of acetylcholine during consciousness and after brain lesions
1. Acetylcholine (ACh) has been collected from the visual cortex of anaesthetized rabbits during stimulation of the lateral geniculate body and after cutting central nervous pathways. ACh has also...
Cholinergic transmission in the frog spinal cord
Mitchell, J. F., Phillis, J. W.
The effect of acetylcholine and other drugs has been tested on the isolated and sagittally hemisected spinal cord of the frog (Rana temporaria). The release of acetylcholine from this preparation...
The characteristics of acetylcholine release mechanisms in the auditory cortex
Hemsworth, B. A., Mitchell, J. F.
1. The characteristics of the acetylcholine (ACh) release mechanism have been studied in the auditory cortex of rabbits on stimulation of the ipsilateral medial geniculate nucleus.
Bourdois, P.S., Mitchell, J.F., Somogyi, G.T., Szerb, J.C.
1 The release of endogenous acetylcholine (ACh) from cerebral cortical slices stimulated at 0.25, 1, 4, 16 and 64 Hz was measured in the presence either of physostigmine or of physostigmine and...