Dynamical Behavior of Spins in the Rare-Earth Kagom\'{e} Pr$_3$Ga$_5$SiO$_{14}$ (2008)
Lumata, L. L., Besara, T., Hoch, M. J. R., Zhou, H. D., Brooks, J. S., ...
We report on the use of $^{69,71}$Ga nuclear magnetic resonance to probe spin dynamics in the rare-earth kagom\'{e} system Pr$_3$Ga$_5$SiO$_{14}$. We find that the spin-lattice relaxation rate...
Lumata, L. L., Brooks, J. S., Kuhns, P. L., Reyes, A. P., Brown, S. E., Cui, H. B., ...
Complementary $^{77}$Se nuclear magnetic resonance (NMR) and electrical transport have been used to correlate the spin density dynamics with the subphases of the field-induced spin density wave...
Debye relaxation in high magnetic fields (2008)
Brooks, J. S., Vasic, R., Kismarahardja, A., Steven, E., Tokumoto, T., Schlottmann, P., ...
Dielectric relaxation is universal in characterizing polar liquids and solids, insulators, and semiconductors, and the theoretical models are well developed. However, in high magnetic fields,...
Wu, Guoqing, Clark, W. G., Brown, S. E., Brooks, J. S., Kobayashi, A., Kobayashi, H.
$^{77}$Se-NMR spectrum and frequency shift measurements in the paramagnetic metal (PM) and antiferromagnetic insulating (AFI) phases are reported for a small single crystal of the organic conductor...
D. A. Osei, F. Alvandi, J. S. Brooks, C. M. Ogilvie
Purpose: Tumors of the perivascular epithelial cell tumor (PEComa), first described in 1992, represent a rare soft tissue neoplasm of varying malignant potential. Cases of PEComa have been previously...
Testing hypotheses for the success of different conservation strategies (2006)
Brooks, J S, Franzen, M A, Holmes, C M, Grote, M N, Borgerhoff Mulder, Monique
Evaluations of the success of different conservation strategies are still in their infancy. We used four different measures of project outcomes-ecological, economic, attitudinal, and behavioral - to...
Vasic, R., Zhou, H., Jobiliong, E., Wiebe, C. R., Brooks, J. S.
The magnetic field dependent phase diagram of the ferroelectric material ${\rm Ho}_{1-x}Y_{x}MnO_{3}$ has been investigated for x = 0, 0.6, and 0.8 for fields directed along both the ab in-plane and...
Quasi-2D superconductivity and Fermi-liquid behavior in bulk CaC$_6$ (2006)
Jobiliong, E., Zhou, H. D., Janik, J. A., Balicas, L., Brooks, J. S., ...
The intercalated graphite superconductor CaC6 with Tc ~ 11.5 K has been synthesized and characterized with magnetoresistance measurements. Above the transition, the resistivity follows a T^2...
EMR Measurements of Field-Induced Superconductor lamda-(BETS)2FexGa1-xCl4 (2005)
Oshima, Y., Jobiliong, E., Brooks, J. S., Zvyagin, S. A., Krzystek, J., Tanaka, H., ...
We have performed high-field Electron Magnetic Resonance (EMR) measurements of lamda-(BETS)2FexGa1-xCl4 to clarify the role of Pi- and d-electrons in the paramagnetic (PM) and field-induced...
Dielectric Relaxation in Nanopillar NiFe-Silicon Structures in High Magnetic Fields (2005)
Vasic, R., Brooks, J. S., Jobiliong, E., Aravamudhan, S., Luongo, K., Bhansali, S.
We explore the dielectric relaxation properties of NiFe nanowires in a nanoporous silicon template. Dielectric data of the NiFe-silicon structure show a strong relaxation resonance near 30K. This...
Magnetic, electronic and Shubnikov-de Haas investigation of the dense Kondo system CeAgSb2 (2005)
Jobiliong, E., Brooks, J. S., Choi, E. S., Lee, Han-Oh, Fisk, Z.
Of the dense Kondo materials in the class CeTSb2 (where T = Au, Ag, Ni, Cu, or Pd), CeAgSb2 is special due to its complex magnetic ground state, which exhibits both ferro- and anti-ferromagnetic...
Magnetic Field Dependence of CDW Phases in Per2M(mnt)2 (M=Pt, Au) (2005)
Brooks, J. S., Graf, D., Choi, E. S., Almeida, M., Dias, J. C., Henriques, R. T., ...
Recently the authors discovered that the suppression of the charge density wave (CDW) ground states by high magnetic fields in the organic conductor series Per2M(mnt)2 is followed by additional high...
Magnetic Field Dependent Behavior of the CDW ground state in Per2M(mnt)2 (M = Au, Pt) (2005)
Brooks, J. S., Graf, D., Choi, E. S., Almeida, M., Dias, J. C., Henriques, R. T., ...
The Per2M(mnt)2 class of organic conductors exhibit a charge density wave (CDW) ground state below about 12 K, which may be suppressed in magnetic fields of order 20 to 30 T. However, for both cases...
Choi, E. S., Brooks, J. S., Kang, H., Jo, Y. J., Kang, W.
We examine an unusual phenomenon where, in tilted magnetic fields near magic angles parallel to crystallographic planes, a "giant" resonant Nernst signal has been observed by Wu et al.[Phys. Rev....
Graf, D., Choi, E. S., Brooks, J. S., Harrison, N., Murata, K., Konoike, T., ...
We have investigated the magnetic field-induced metal-insulator transition in the tau-phase organic conductors, which occurs in fields above 35 T, and below 14 K, by magnetization, thermoelectric,...
Magnetism and electron spin resonance in single crystalline beta-AgNpO2(SeO3) (2004)
Jobiliong, E., Oshima, Y., Brooks, J. S., Albrecht-Schmitt, T. E.
We report magnetization, susceptibility, electrical transport, and electron spin resonance (ESR) studies of single crystals of beta-AgNpO2(SeO3). Here the valence of the Np sites is expected to be...
High Field ESR Study of the pi-d Correlated Organic Conductor lambda-(BETS)2Fe0.6Ga0.4Cl4 (2004)
Oshima, Y., Jobiliong, E., Tokumoto, T., Brooks, J. S., Zvyagin, S. A., Krzystek, J., ...
Submillimeter and millimeter wave electron spin resonance (ESR) measurements of the pi-d correlated organic conductor lambda-(BETS)2Fe0.6Ga0.4Cl4 have been performed. Antiferromagnetic resonance...
Graf, D., Choi, E. S., Brooks, J. S., Henriques, Rui T., Almeida, M., Matos, M.
We have measured the high field magnetoresistence and magnetization of quasi-one- dimensional (Q1D) organic conductor (Per)2Pt(mnt)2 (where Per = perylene and mnt = maleonitriledithiolate), which has...
Brooks,J.S., Uji,S., Choi,E.S., Rutel,I.B., Kobayashi,H., Kobayashi,A., ...
Alloy studies in the p - d organic conductor l-(BETS)2Fe xGa1-xCl4 have given new insight into the nature of field induced superconductivity (FISC), since the mechanism of the FISC involves...
Graf, D., Brooks, J. S., Choi, E. S., Uji, S., Dias, J. C., Almeida, M., ...
The charge density wave (CDW) transition temperature in the quasi-one dimensional (Q1D) organic material of (Per)$_2$Au(mnt)$_2$ is relatively low (TCDW = 12 K). Hence in a mean field BCS model, the...
North, J. M., Zipse, D., Dalal, N. S., Choi, E. S., Jobiliong, E., Brooks, J. S., ...
Resistivity measurements are reported for single crystals of Mn12-Acetate and Fe8Br8. Both materials exhibit a semiconductor-like, thermally activated behavior over the 200-300 K range. The...
North, J. M., Zipse, D., Dalal, N. S., Choi, E. S., Jobiliong, E., Brooks, J. S., ...
Resistivity measurements are reported for single crystals of Mn$_{12}$-Acetate and Fe$_8$Br$_8$. Both materials exhibit a semiconductor-like, thermally activated behavior over the 200-300 K range....
High magnetic field-induced insulating phase in an organic conductor (2002)
Brooks, J. S., Graf, D., Choi, E. S., Balicas, L., Storr, K., Mielke, C. H., ...
We report electrical transport, skin depth, and magnetocaloric measurements in the tau-series of organic conductors at very high magnetic fields. Above 36 T these materials show a magnetic field...
High field magnetic resonant properties of beta'-(ET)2SF5CF2SO3 (2002)
Rutel, I. B., Zvyagin, S. A., Brooks, J. S., Krzystek, J., Kuhns, P., Reyes, A. P., ...
A systematic electron spin resonance (ESR) investigation of the low temperature regime for the (ET)2SF5CF2SO3 system was performed in the frequency range of ~200-700 GHz, using backward wave...
Choi, E. S., Jobiling, E., Wade, A., Goetz, E., Brooks, J. S., Yamada, J., ...
The quantum oscillatory effect and superconductivity in a non-tetrachalcogenafulvalene (TCF) structure based organic superconductor beta-(BDA-TTP)_2SbF_6 are studied. Here the Shubnikov-de Haas...
Disorder-driven magnetic field-dependent phases in an organic conductor (2002)
Storr, K., Graf, D., Brooks, J. S., Balicas, L., Mielke, C., Papavassiliou, G. C.
We report inter-plane ($R_{zz}$) electrical transport measurements in the \tp series of organic conductors at very high magnetic fields. In the field range between 36 and 60 T $R_{zz}$ shows a very...
Coherent vs incoherent interlayer transport in layered metals (2002)
Wosnitza, J., Hagel, J., Qualls, J. S., Brooks, J. S., Balthes, E., Schweitzer, D., ...
The magnetic-field, temperature, and angular dependence of the interlayer magnetoresistance of two different quasi-two-dimensional (2D) organic superconductors is reported. For...
Photo-response of the conductivity in functionalized pentacene compounds (2002)
Tokumoto, T., Brooks, J. S., Clinite, R., Wei, X., Anthony, J. E., Eaton, D. L., ...
We report the first investigation of the photo-response of the conductivity of a new class of organic semiconductors based on functionalized pentacene. These materials form high quality single...
Brooks, J. S., Balicasa, L., Matson, J., Storr, K., Kobayashi, H., Tanaka, H., ...
We examine magnetic field dependent properties associated with the newly discovered field-induced superconducting state (FISC) in lambda-BETS2FeCl4. These include the metal-to-antiferromagnetic...
Kornilov, A. V., Pudalov, V. M., Kitaoka, Y., Ishida, K., Mito, T., Tateiwa, N., ...
We report unexpected features of the transport in the dielectric spin density wave (SDW) phase of the quasi one-dimensional compound (TMTSF)_2PF_6: the resistance exhibits a maximum and a subsequent...
Choi, E. S., Brooks, J. S., Qualls, J. S.
We have used a low-frequency magneto-thermopower (MTEP) method to probe the high magnetic field ground state behavior of $\alpha$-(BEDT-TTF)$_2$KHg(SCN)$_4$ along all three principal crystallographic...
Superconductivity in an organic insulator at very high magnetic fields (2001)
Balicas, L., Brooks, J. S., Storr, K., Uji, S., Tokumoto, M., Tanaka, H., ...
We investigate by electrical transport the field-induced superconducting state (FISC) in the organic conductor $\lambda$-(BETS)$_2$FeCl$_4$. Below 4 K, antiferromagnetic-insulator, metallic, and...
Novel Phases in the Field Induced Spin Density Wave State in (TMTSF)_2PF_6 (2001)
Kornilov, A. V., Pudalov, V. M., Kitaoka, Y., Ishida, K., Mito, T., Brooks, J. S., ...
Magnetoresistance measurements on the quasi one-dimensional organic conductor (TMTSF)_2PF_6 performed in magnetic fields B up to 16T, temperatures T down to 0.12K and under pressures P up to 14kbar...
Field-induced metal-insulator transition in a two-dimensional organic superconductor (2001)
Wosnitza, J., Wanka, S., Hagel, J., Von Löhneysen, H., Qualls, J. S., Brooks, J. S., ...
Electronic Structure of Novel Cation-Radical Salts in High Magnetic Fields (2000)
Brooks, J. S., Balicas, L., Storr, K., Ward, B. H., Uji, S., Terashima, T., ...
Two organic conducting materials, where unusual aspects of their composition play important roles, are explored: beta''-(BEDT-TTF)2SF5XSO3 which exhibits superconductivity, or a metal-insulator...
Storr, K., Balicas, L., Brooks, J. S., Graf, D., Papavassiliou, G. C.
We present an electrical transport study of the 2-dimensional (2D) organic conductor tau-(P-(S,S)-DMEDT-TTF)_2(AuBr)_2(AuBr_2)_y (y = 0.75) at low temperatures and high magnetic fields. The...
On the absence of spin-splitting in alpha-(BEDT-TTF)2KHg(SCN)4 (2000)
Harrison, N., Biskup, N., Brooks, J. S., Balicas, L., Tokumoto, M.
We report the results of a detailed study of the field orientation-dependence of the de Haas-van Alphen waveform in $\alpha$-(BEDT-TTF)$_2$KHg(SCN)$_4$. By considering the field...
Field-induced metal-insulator transition in a two-dimensional organic superconductor (2000)
Wosnitza, J., Wanka, S., Hagel, J., Loehneysen, H. V., Qualls, J. S., Brooks, J. S., ...
The quasi-two-dimensional organic superconductor beta-(BEDT-TTF)_2SF_5CH_2CF_2SO_3 (T_c approx 4.4 K)shows very strong Shubnikov-de Haas (SdH) oscillations which are superimposed on a highly...
Magneto-thermal instabilities in kappa-(BEDT-TTF)2Cu(NCS)2 (2000)
Mola, M. M., Hill, S., Brooks, J. S., Qualls, J. S.
Angle and temperature dependent torque magnetization measurements are reported for the organic superconductor kappa-(BEDT-TTF)2Cu(NCS)2, at extremely low temperatures (approx. Tc/10^3)....
Choi, E. S., Brooks, J. S., Qualls, J. S., Song, Y. S.
We describe an AC method for the measurement of the longitudinal (Sxx) and transverse (Sxy, i.e. Nernst) thermopower of mm-size single crystal samples at low temperatures (T30 T). A low-frequency (33...
Choi, E. S., Brooks, J. S., Han, S. Y., Balicas, L., Qualls, J. S.
We have employed uniaxial stress along the principal axes of the quasi-two dimensional organic superconductor $\kappa $--(BEDT-TTF)$_{2}$Cu(SCN)$_{2}$. The lattice anisotropy is thereby altered, with...
Balicas, L., Brooks, J. S., Storr, K., Graf, D., Uji, S., Shinagawa, H., ...
Shubnikov-De Haas effect (SdH) effect and angular dependent magnetoresistance oscillations (AMRO) were observed in the organic superconductor: $\kappa$-(BETS)$_2$FeBr$_4$. In contrast to its...
Quantum melting of the quasi-two-dimensional vortex lattice in kappa-(ET)2Cu(NCS)2 (2000)
Mola, M. M., Hill, S., Brooks, J. S., Qualls, J. S.
We report torque magnetization measurements in regions of the mixed state phase diagram (${\bf B}\sim\mu_o{\bf H}_{c2}$ and T$_c$/$10^3$) of the organic superconductor $\kappa-$(ET)$_2$Cu(NCS)$_2$...
The High Magnetic Field Phase Diagram of a Quasi-One Dimensional Metal (2000)
Qualls, J. S., Mielke, C. H., Brooks, J. S., Montgomery, L. K., Rickel, D. G., Harrison, N., ...
We present a unique high magnetic field phase of the quasi-one dimensional organic conductor (TMTSF)$_2$ClO$_4$. This phase, termed "Q-ClO$_4$", is obtained by rapid thermal quenching to avoid...
Competition between Pauli and orbital effects in a charge-density wave system (2000)
Qualls, J. S., Balicas, L., Brooks, J. S., Harrison, N., Montgomery, L. K., Tokumoto, M.
We present angular dependent magneto-transport and magnetization measurements on alpha-(ET)2MHg(SCN)4 compounds at high magnetic fields and low temperatures. We find that the low temperature ground...
Temperature and Angular Dependence of the Magnetoresistance in Low Dimensional Organic Metals (2000)
Qualls, J. S., Brooks, J. S., Uji, S., Terashima, T., Terakura, C., Aoki, H., ...
Detailed studies of the magnetoresistance of alpha-(ET)2KHg(SCN)4 and alpha-(ET)2TlHg(SCN)4 as a function of temperature, magnetic field strength, and field orientation are reported. Below 15 K, the...
Critical State Behaviour in a Low Dimensional Metal Induced by Strong Magnetic Fields (2000)
Harrison, N., Balicas, L., Brooks, J. S., Tokumoto, M.
We present the results of magnetotransport and magnetic torque measurements on the alpha-(BEDT-TTF)2KHg(SCN)4 charge-transfer salt within the high magnetic field phase, in magnetic fields extending...
Josephson plasma resonance in k-(BEDT-TTF)2Cu(NCS)2 (2000)
Mola, M. M., King, J. T., McRaven, C. P., Hill, S., Qualls, J. S., Brooks, J. S.
A cavity perturbation technique is used to study the microwave response of the organic superconductor k-(BEDT-TTF)2Cu(NCS)2. Observation of a Josephson plasma resonance, below Tc (approx. 10 K),...
Cyclotron Resonance in the Layered Perovskite Superconductor Sr2RuO4 (1999)
Hill, S., Brooks, J. S., Mao, Z. Q., Maeno, Y.
We have measured the cyclotron masses in Sr2RuO4 through the observation of periodic-orbit-resonances - a magnetic resonance technique closely related to cyclotron resonance. We obtain values for the...
Zuo, F., Brooks, J. S., McKenzie, Ross H., Schlueter, J. A., Williams, Jack M.
We report detailed measurements of the interlayer magnetoresistance of the layered organic superconductor $\kappa -(BEDT-TTF)_2Cu(SCN)_2$ for temperatures down to 0.5 K and fields up to 30 tesla. The...
O'Brien, J. L., Nakagawa, H., Dzurak, A. S., Clark, R. G., Kane, B. E., Lumpkin, N. E., ...
The B-T phase diagram for thin film YBa_2Cu_3O_7-d with B parallel to the superconducting layers has been constructed from GHz transport measurements to 150T. Evidence for a transition from a high T...
Violation of Kohler's rule by the magnetoresistance of a quasi-two-dimensional organic metal (1997)
McKenzie, Ross H., Qualls, J. S., Han, S. Y., Brooks, J. S.
The interlayer magnetoresistance of the quasi-two-dimensional metal $\alpha$-(BEDT-TTF)$_2$KHg(SCN)$_4$ is considered. In the temperature range from 0.5 to 10 K and for fields up to 10 tesla the...
Cyclotron resonance studies of the molecular conductor d(2)[1,1;0]-(DMe-DCNQI)(2)Cu (1997)
Aonuma, S., Sawa, H., Kato, R., Brooks, J.S., Wittlin, A., ...
McKenzie, Ross H., Athas, G. J., Brooks, J. S., Clark, R. G., Dzurak, A. S., Newbury, R., ...
The magnetic field dependence of the resistance of (BEDT-TTF)$_2$MHg(SCN)$_4$[M=K,Rb,Tl] in the density-wave phase is explained in terms of a simple model involving magnetic breakdown and a...
Quantum Hall Transitions in (TMTSF)$_2$PF$_6$ (1996)
Valfells, S., Brooks, J. S., Wang, Z., Takasaki, S., Yamada, J., Anzai, H., ...
We have studied the temperature dependence of the integer quantum Hall transitions in the molecular crystal (TMTSF)$_2$PF$_6$. We find that the transition width between the quantum Hall plateaus does...
Aonuma, S., Sawa, H., Kato, R., Brooks, J.S., Uji, S., Wittlin, A., ...
Uniaxial-Stress-Induced Superconductivity in Organic Conductors (1995)
Anzai, H., Tokumoto, M., Kinoshita, N., Kinoshita, T., Tanaka, Y., Valfells, S., ...