Persistent Spin Dynamics in the $S=1/2$ V$_{15}$ Molecular Nano-Magnet (2008)
Salman, Z., Kiefl, R. F., Chow, K. H., MacFarlane, W. A., Keeler, T., Parolin, T., ...
We present muon spin lattice relaxation measurements in the V15 spin 1/2 molecular nano-magnet. We find that the relaxation rate in low magnetic fields (
Local Magnetic Properties of a Monolayer of Mn12 Single Molecule Magnets (2008)
Salman, Z., Chow, K. H., Miller, R. I., Morello, A., Parolin, T. J., Hossain, M. D., ...
The magnetic properties of a monolayer of Mn12 single molecule magnets grafted onto a Si substrate have been investigated using depth-controlled $\beta$-detected nuclear magnetic resonance. A low...
Keeler, T. A., Salman, Z., Chow, K. H., Heinrich, B., Hossian, M. D., Kardasz, B., ...
Low energy $\beta$-detected nuclear magnetic resonance ($\beta$-NMR) was used to investigate the spatial dependence of the hyperfine magnetic fields induced by Fe in the nonmagnetic Ag of an Au(40...
Local magnetic properties of a monolayer of Mn-12 single molecule magnets (2007)
Salman, Z., Chow, K. H., Miller, R. I., Morello, A., Parolin, T. J., Hossain, M. D., ...
The magnetic properties of a monolayer of Mn12 single molecule magnets grafted onto a silicon (Si) substrate have been investigated using depth-controlled beta-detected nuclear magnetic resonance. A...
Correlation length in cuprates deduced from the impurity-induced magnetization (2007)
Ouazi, S., Bobroff, J., Alloul, H., MacFarlane, W. A.
We report a new multi-nuclei based NMR method which allows us to image the staggered polarization induced by nonmagnetic Li impurities in underdoped O6.6 and slightly overdoped O7 YBa2Cu3O6+y above...
Giant Vortices Below the Surface of NbSe$_2$ Detected Using Low Energy $\beta$-NMR (2007)
Salman, Z., Wang, D., Chow, K. H., Hossain, M. D., Kreitzman, S. R., Keeler, T. A., ...
A low energy radioactive beam of polarized $^8$Li has been used to observe the vortex lattice near the surface of superconducting NbSe$_2$. The inhomogeneous magnetic field distribution associated...
Beta-NMR of Isolated Lithium in Nearly Ferromagnetic Palladium (2007)
Parolin, T. J., Salman, Z., Chakhalian, J., Song, Q., Chow, K. H., Hossain, M. D., ...
The temperature dependence of the frequency shift and spin-lattice relaxation rate of isolated, nonmagnetic Li-8 impurities implanted in a nearly ferromagnetic host (Pd) are measured by means of...
$\beta$-NMR of Isolated $^{8}$Li$^{+}$ Implanted into a Thin Copper Film (2006)
Salman, Z., Mansour, A. I., Chow, K. H., Beaudoin, M., Fan, I., Jung, J., ...
Depth-controlled $\beta$-NMR was used to study highly spin-polarized $^8$Li in a Cu film of thickness 100 nm deposited onto a MgO substrate. The positive Knight Shifts and spin relaxation data show...
Yamani, Z., Statt, B. W., MacFarlane, W. A., Liang, Ruixing, Bonn, D. A., Hardy, W. N.
Nuclear magnetic resonance (NMR) measurements of CuO chains of detwinned Ortho-II YBa$_2$Cu$_3$O$_{6.5}$ (YBCO6.5) single crystals reveal unusual and remarkable properties. The chain Cu resonance...
β-NMR of Palladium foil (2006)
Parolin, T. J., Salman, Z., Chakhalian, J., Wang, D., Keeler, T. A., Hossain, M., ...
Beta-detected NMR (beta-NMR) of low-energy implanted Li-8(+) was studied in metallic palladium. The resonance was found to have a large negative shift with respect to the reference signal in the...
A μSR study of the magnetism in Prussian Blue analogue photomagnets (2006)
Salman, Z., Parolin, T. J., Chow, K. H., Keeler, T. A., Miller, R. I., Wang, D., ...
In this work we present longitudinal field mu SR results in the molecular magnetic Co-Fe Prussian Blue analogue Rb1-2xCo1+x[Fe(CN)(6)] center dot zH(2)O, with x approximate to 0.17 which exhibits...
Magnetic field dependence of muon spin relaxation in geometrically frustrated Gd2Ti2O7 (2006)
Dunsiger, S. R., Kiefl, R. F., Chakhalian, J. A., Greedan, J. E., MacFarlane, W. A., Miller, R. I., ...
Salman, Z., Parolin, T. J., Chow, K. H., Keeler, T. A., Miller, R. I., Wang, D., ...
We present longitudinal field muon spin relaxation ($\mu$SR) measurements in the unilluminated state of the photo-sensitive molecular magnetic Co-Fe Prussian blue analogues...
Salman, Z., Kiefl, R. F., Chow, K. H., Hossain, M. D., Keeler, T. A., Kreitzman, S. R., ...
We demonstrate that zero-field $\beta$-detected nuclear quadrupole resonance and spin relaxation of low energy $^8$Li can be used as a sensitive local probe of structural phase transitions near a...
Beta-Detected NQR in Zero Field with a Low Energy Beam of \nuc{8}{Li}$^+$ (2005)
Salman, Z., Kiefl, R. F., Chow, K. H., MacFarlane, W. A., Arseneau, D. J., Daviel, S., ...
Beta-detected nuclear quadrupole resonances (\bnqr) at zero field are observed using a beam of low energy highly polarized radioactive \nuc{8}{Li}$^+$. The resonances were detected in SrTiO$_3$,...
$\beta$-Detected NMR of $^8$Li in the Normal State of 2H-NbSe$_2$ (2005)
Wang, D., Hossain, M. D., Salman, Z., Arseneau, D., Chow, K. H., Daviel, S., ...
$\beta$-NMR of isolated $^8$Li has been investigated in the normal state of 2H-NbSe$_2$. In a high magnetic field of 3T a single resonance is observed with a Gaussian line width of 3.5 kHz. The line...
Cu NMR Study of Detwinned Single Crystals of Ortho--II YBCO6.5 (2003)
Yamani, Z., MacFarlane, W. A., Statt, B. W., Bonn, D., Liang, R., Hardy, W. N.
Copper NMR has been used as a local probe of the oxygen ordering in Ortho--II YBa2Cu3O6.5 crystals grown in BaZrO3 crucibles. Line assignments have been made to each of the expected...
Dooglav, A. V., Egorov, A. V., Mukhamedshin, I. R., Savinkov, A. V., Alloul, H., Bobroff, J., ...
We present a detailed NQR, NMR and $\mu $SR study of a magnetic phase obtained during a topotactic chemical reaction of YBa$_{2}$Cu$_{3}$O$_{6.5}$ high- temperature superconductor with low-pressure...
Correlation length in cuprates deduced from the impurity-induced magnetization (2003)
Ouazi, S., Bobroff, J., Alloul, H., MacFarlane, W. A.
We report a new multi-nuclei based NMR method which allows us to image the staggered polarization induced by nonmagnetic Li impurities in underdoped O6.6 and slightly overdoped O7 YBa2Cu3O6+y above...
Chakhalian, J. A., Kiefl, R. F., Miller, R., Brewer, J., Dunsiger, S. R., Morris, G., ...
We report muon spin rotation measurements of the local magnetic susceptibility around a positive muon in the paramagnetic state of the quasi one-dimensional spin 1/2 antiferromagnet dichlorobis...
Elastic Tensor of Sr$_2$RuO$_4$ (2002)
Paglione, Johnpierre, Lupien, C., MacFarlane, W. A., Perz, J. M., Taillefer, Louis, Mao, Z. Q., ...
The six independent elastic constants of Sr$_2$RuO$_4$ were determined using resonant ultrasound spectroscopy on a high-quality single-crystal specimen. The constants are in excellent agreement with...
Planar 17O NMR study of Pr_yY_{1-y}Ba_2Cu_3O_{6+x} (2002)
MacFarlane, W. A., Bobroff, J., Mendels, P., Cyrot, L., Alloul, H., Blanchard, N., ...
We report the planar ^{17}O NMR shift in Pr substituted YBa_{2}Cu_{3}O_{6+x}, which at x=1 exhibits a characteristic pseudogap temperature dependence, confirming that Pr reduces the concentration of...
Lupien, C., MacFarlane, W. A., Proust, Cyril, Taillefer, Louis, Mao, Z. Q., Maeno, Y.
We present a study of the electronic ultrasound attenuation $\alpha$ in the unconventional superconductor Sr$_2$RuO$_4$ . The power law behavior of $\alpha$ at temperatures down to $T_c/30$ clearly...
Ultrasound Attenuation in Sr2RuO4 (2001)
Lupien, C., MacFarlane, W. A., Mao, Z. Q., Proust, Cyril, Taillefer, Louis
Persistence of Li Induced Kondo Moments in the Superconducting State of Cuprates (2001)
Alloul, H., Blanchard, N., Bobroff, J., MacFarlane, W. A., Mendels, P.
Persistence of Li Induced Kondo Moments in the Superconducting State of Cuprates (2000)
Bobroff, J., Alloul, H., MacFarlane, W. A., Mendels, P., Blanchard, N., Collin, G., ...
We measure the magnetic susceptibility nearby Li spinless impurities in the superconducting phase of the high Tc cuprate YBaCuO. The induced moment which was found to exist above Tc persists below...
Reply to the comment of Tallon et al. Cond-Mat/0008295 about Phys. Rev. Lett. 83, 4381 (1999) (2000)
Bobroff, J., MacFarlane, W. A., Alloul, H., Mendels, P.
It is shown both from a qualitative and quantitative analysis that the T-dependence of the pure susceptibility detected by Tallon et al. in overdoped compounds cannot explain the T-dependence of the...
Antiferromagnetism in water doped YBa2Cu3O6+x for x~0.5 (2000)
MacFarlane, W A, Mendels, P, Bobroff, J, Alloul, H, Blanchard, N, Dooglav, A V, ...
Dynamics of the Local Moment Induced by Nonmagnetic Defects in Cuprates (1999)
MacFarlane, W. A., Bobroff, J., Alloul, H., Mendels, P., Blanchard, N., Collin, G., ...
We present a study of the spin dynamics of magnetic defects induced by Li substitution of the plane Cu in the normal state of YBa$_2$Cu$_3$O$_{6+x}$. The fluctuations of the coupled Cu magnetic...
Melting and Dimensionality of the Vortex Lattice in Underdoped YBa2Cu3O6.60 (1999)
Sonier, J. E., Brewer, J. H., Kiefl, R. F., Bonn, D. A., Chakhalian, J., Dunsiger, S. R., ...
Muon spin rotation measurements of the magnetic field distribution in the vortex state of the oxygen deficient high-Tc superconductor YBa{2}Cu{3}O{6.60} reveal a vortex-lattice melting transition at...
Antiferromagnetism in hydrated 123 compounds (1999)
Dooglav, A. V., Egorov, A. V., Mukhamedshin, I. R., Savinkov, A. V., Alloul, H., Bobroff, J., ...
Copper nuclear quadrupole resonance (NQR) and zero field nuclear magnetic resonance (ZFNMR) studies of YBa$_2$Cu$_3$O$_{6.5}$ show that a magnetic phase appears in underdoped 123 superconductors...
Spinless impurities in high Tc cuprates: Kondo-like behavior (1999)
Bobroff, J., MacFarlane, W. A., Alloul, H., Mendels, P., Blanchard, N., Collin, G., ...
We compare the effects of in-plane non magnetic Li$^{+}$ and Zn$^{2+}$ impurities on the normal state of high-T$_{c}$ cuprates. Y NMR shows that the extra hole introduced by Li is not localized in...
Sonier, J. E., Brewer, J. H., Kiefl, R. F., Bonn, D. A., Dunsiger, S. R., Hardy, W. N., ...
The internal field distribution in the vortex state of YBa2Cu3O6.60 is shown to be a sensitive measure of both the magnetic penetration depth and the vortex-core radius. The temperature dependence of...
Sonier, J. E., Kiefl, R. F., Brewer, J. H., Chakhalian, J., Dunsiger, S. R., MacFarlane, W. A., ...
Muon-spin rotation spectroscopy has been used to measure the internal magnetic field distribution in NbSe2 for Hc1
The giant muon Knight shift in antimony: Evidence for a Kondo impurity (1997)
Johnston, T. M. S., Chow, K. H., Dunsiger, S., Duty, T., Kie, R. F., Koster, E., ...
A detailed study has been undertaken of the muon Knight shift in high purity antimony single crystals. No periodic variations with magnetic field (de Haas–van Alphen oscillations) are observed. The...
The giant muon Knight shift in antimony: Evidence for a Kondo impurity (1997)
Johnston, T. M. S., Chow, K. H., Dunsiger, S., Duty, T., Kie, R. F., Koster, E., ...
A detailed study has been undertaken of the muon Knight shift in high purity antimony single crystals. No periodic variations with magnetic field (de Haas–van Alphen oscillations) are observed. The...
Dunsiger, S. R., Kiefl, R. F., Chow, K. H., Gaulin, B. D., Gingras, M. J. P., Greedan, J. E., ...
The spin dynamics of geometrically frustrated pyrochlore antiferromagnets Y2Mo2O7 and Tb2Mo2O7 have been investigated using muon spin relaxation. A dramatic slowing down of the moment fluctuations...
Structure of negatively charged muonium in n-type GaAs (1995)
Chow, K H, Kiefl, R F, MacFarlane, W A, Schneider, J W, Cooke, D W, Leon, M, ...
Muonium dynamics in doped si above room temperature studied by longitudinal field-mu-sr (1994)
Chow, K.H., Kiefl, R.F., Schneider, J.W., Estle, T.L., Hitti, B., Lichti, R.L., ...
Muonium dynamics in doped si above room temperature studied by longitudinal field-mu-sr (1994)
Chow, K.H., Kiefl, R.F., Schneider, J.W., Estle, T.L., Hitti, B., Lichti, R.L., ...
Hebel-Slichter peak and superconducting energy gap in Rb3C60 observed by muon spin relaxation (1994)
MacFarlane, W. A., Kiefl, R. F., Chow, K. H., Dunsiger, S., Duty, T., Johnston, T. M. S., ...
Muon spin relaxation has been observed in both the normal and superconducting states of Rb3C60 (T c=29.3K). The field dependence of the T1 spin relaxation rate is due to muonium undergoing...
Hebel-Slichter peak and superconducting energy gap in Rb3C60 observed by muon spin relaxation (1994)
MacFarlane, W. A., Kiefl, R. F., Chow, K. H., Dunsiger, S., Duty, T., Johnston, T. M. S., ...
Muon spin relaxation has been observed in both the normal and superconducting states of Rb3C60 (T c=29.3K). The field dependence of the T1 spin relaxation rate is due to muonium undergoing...
Muonium dynamics in Si at high temperatures (1993)
Chow, K.H., Kiefl, R.F., Schneider, J.W., Hitti, B., Estle, T.L., Lichti, R.L., ...
Muonium dynamics in Si at high temperatures (1993)
Chow, K.H., Kiefl, R.F., Schneider, J.W., Hitti, B., Estle, T.L., Lichti, R.L., ...
Coherence peak and superconducting energy gap in Rb3C60 observed by muon spin relaxation (1993)
Kiefl, R. F., MacFarlane, W. A., Chow, K. H., Dunsiger, S., Duty, T., Johnston, T. M. S., ...
Muon spin relaxation resulting from spin exchange scattering of endohedral muonium (μ+e-) with thermal electronic excitations has been observed in the fullerene superconductor Rb3C60. The...
Coherence peak and superconducting energy gap in Rb3C60 observed by muon spin relaxation (1993)
Kiefl, R. F., MacFarlane, W. A., Chow, K. H., Dunsiger, S., Duty, T., Johnston, T. M. S., ...
Muon spin relaxation resulting from spin exchange scattering of endohedral muonium (μ+e-) with thermal electronic excitations has been observed in the fullerene superconductor Rb3C60. The...
Evidence for endohedral muonium in Kx C60 and consequences for electronic structure (1992)
Kiefl, R. F., Duty, T., Schneider, J. W., MacFarlane, W. A., Chow, K., Elzey, J. W., ...
Positive muons injected into solid C60, K4C60, and K6C60 form vacuumlike muonium (μ+e-) with a (6–12)% probability. Observation of coherent spin precession of muonium establishes that all three...
Evidence for endohedral muonium in Kx C60 and consequences for electronic structure (1992)
Kiefl, R. F., Duty, T., Schneider, J. W., MacFarlane, W. A., Chow, K., Elzey, J. W., ...
Positive muons injected into solid C60, K4C60, and K6C60 form vacuumlike muonium (μ+e-) with a (6–12)% probability. Observation of coherent spin precession of muonium establishes that all three...