Probing the vortex state in CaC$_6$ using transverse field muon spin rotation (2008)
Kanigel, A., Di Castro, D., Keren, A., Postorino, P., Rosenmann, D., Welp, U., ...
We report temperature and transverse field-dependent muon spin relaxation measurements in a c-axis oriented sample of the superconductor CaC$_{6}$. The results indicate a fully gapped Fermi surface...
Experimental estimates of dephasing time in molecular magnets (2007)
Keren, A, Shafir, O, Shimshoni, E, Marvaud, V, Bachschmidt, A, Long, J
Oxide muonics: I. Modelling the electrical activity of hydrogen in semiconducting oxides (2006)
Cox, S F J, Lord, J S, Cottrell, S P, Gil, J M, Alberto, H V, Keren, A, ...
g-Sign determination with circularly polarised RF fields (2006)
Lord, J S, Keren, A, Vilao, R C
We have used a pair of crossed coils to generate rotating RF fields for a muon spin resonance measurement by driving one of the two coils and adjusting the tuned frequencies and mutual coupling to...
Oxide muonics: A new compendium (2006)
Cox, SFJ, Lord, JS, Cottrell, SP, Gil, JM, Alberto, HV, Piroto Duarte, J, ...
A new survey of muonium states brings the total of binary non-magnetic oxides studied to 30, with normal muoniumthe interstitially trapped atomic statefound in 15 of these. The number of...
Magnetic analog of the isotope effect in cuprates (2006)
Ofer, R, Bazalitsky, G, Kanigel, A, Keren, A, Auerbach, A, Lord, J S, ...
We present extensive magnetic measurements of the (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy system with its four different families (x) having a Tcmax(x) variation of 28% and minimal structural changes. For...
Anomaly in YBa2Cu4O8 charge distribution below Tc: A zero-field muon spin relaxation study (2005)
Carretta, P, Keren, A, Lord, J S, Zucca, I, Kazakov, S M, Karpinski, J
Zero-field muon spin-relaxation (µSR) measurements in 63Cu isotope enriched and natural YBa2Cu4O8 powders are presented. The µ+ relaxation rate is characterized by a sizeable enhancement as the...
Anomaly in YBa2Cu4O8 charge distribution below Tc: a zero-field muSR study (2004)
Carretta, P., Keren, A., Lord, J. S., Zucca, I., Kazakov, S. M., Karpinski, J.
Zero-field $\mu$SR measurements in $^{63}$Cu isotope enriched and natural YBa$_2$Cu$_4$O$_8$ powders are presented. The temperature dependence of the $\mu^+$ relaxation rate is characterized by a...
Dynamic properties of a diluted pyrochlore cooperative paramagnet (Tb_pY_{1-p})_2Ti_2O_7 (2004)
Keren, A., Gardner, J. S., Ehlers, G., Fukaya, A., Sagi, E., Uemura, Y. J.
Investigations of the spin dynamics of the geometrically frustrated pyrochlore (Tb_pY_{1-p})_2Ti_2O_7, using muon spin relaxation and neutron spin echo, as a function of magnetic coverage p, have...
Muon spin relaxation measurements of NaxCoO2.yH2O (2004)
Kanigel, A, Keren, A, Patlagan, L, Chashka, K B, King, P J C, Amato, A
Hyperfine parameters for muonium in copper (I), silver (I) and cadmium oxides (2004)
Cox, S F J, Lord, J S, Cottrell, S P, Alberto, H V, Gil, J M, Piroto Duarte, J, ...
Dynamic properties of a diluted pyrochlore cooperative paramagnet (TbpY1-p)2Ti2O7 (2004)
Keren, A, Gardner, J S, Ehlers, G, Fukaya, A, Segal, E, Uemura, Y J
Muon Spin Relaxation Measurements in Na_xCoO_2*yH_2O (2003)
Kanigel, A., Keren, A., Patlagan, L., Chashka, K. B., Fisher, B., King, P., ...
Using the transverse field muon spin relaxation technique we measure the temperature dependence of the magnetic field penetration depth $\lambda$, in the Na$_{x}$CoO$_{2}\cdot y$H$_{2}$O system. We...
Fukaya, A., Fudamoto, Y., Gat, I. M., Ito, T., Larkin, M. I., Savici, A. T., ...
Muon spin relaxation ($\mu$SR) and magnetic susceptibility measurements have been performed on the pure and diluted spin 1/2 kagom\'{e} system (Cu$_x$Zn$_{1-x}$)$_{3}$V$_{2}$O$_7$(OH)$_{2}$ 2H$_2$O....
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...
Dynamic frustrated magnetism in Tb2Ti2O7 at 50 mK (2003)
Gardner, J S, Keren, A, Ehlers, G, Stock, C, Segal, E, Roper, J M, ...
Keren, A., Kanigel, A., Lord, J., Amato, A.
The (Ca_xLa_(1-x))(Ba_(1.75-x)La_(0.25+x))Cu_(3)O_(y) system is ideal for testing theories of high temperature superconductivity, since nearly the full range of doping is controlled by y, and...
Dynamics at T->0 in half-integer isotropic high spin molecules (2002)
Salman, Z, Keren, A, Mendels, P, Scuiller, A, Verdaguer, M, Lord, J S, ...
The need for European Registries in inherited cardiomyopathies (2002)
Arbustini, E., Cecchi, F., Dubourg, O., Frenneaux, M., Keren, A., Khul, U., ...
Ga NMR study of the local susceptibility in SrCr8Ga4O19: pseudogap and paramagnetic defects (2000)
Mendels, P., Keren, A., Limot, L., Mekata, M., Collin, G., Horvatic, M.
We present the first Ga(4f) NMR study of the Cr susceptibility in the archetype of Kagome based frustrated antiferromagnets, SrCr$_{8}$Ga$_{4}$O$_{19}$. Our major finding is that the susceptibility...
Keren, A., Uemura, Y. J., Luke, G., Mendels, P., Mekata, M., Asano, T.
We investigate the spin dynamics of SrCr$_{9p}$Ga$_{12-9p}$O$_{19}$ for p below and above the percolation threshold p_c using muon spin relaxation. Our major findings are: (I) At T->0 the relaxation...
Magnetic quantum tunneling in the half-integer high spin molecule CrNi6: a muSR study (1998)
Keren, A., Mendels, P., Kratzer, A., Scuiller, A., Verdaguer, M., Slaman, Z., ...
In high spin molecules metal ions are coupled by ferro or antiferromagnetic short range interactions so that their magnetic moments are parallel or antiparallel to each other at temperatures (T) much...
69,71Ga NMR in the kagomé lattice compound SrCr9-xGa3+xO19. (1998)
Keren, A., Mendels, P., Horvatić, M., Ferrer, F., Uemura, Y. J., Mekata, M., ...
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...
Transverse Relaxation, O -c, A. Keren, H. Alloul, P. Mendels, Y. Yoshinari, ...
NMR transverse relaxation (TR) measurements of 17 O in the O(2,3) sites of YBa 2 Cu 3 ( 16 O 1-c 17 O c ) 7 are presented. A Gaussian-like relaxation is found. The origin of this relaxation is...
Aborted sudden death in a young patient with isolated granulomatous myocarditis (1994)
KHOURY, Z., KEREN, A., BENHORIN, J., STERN, S.
A young athlete was successfully resuscitated from ventricular fibrillation. Subsequently severe heart failure developed and endomyocardial biopsy showed granulomatous myocarditis. Following steroid...
Comparative recognition of left ventricular thrombi by echocardiography and cineangiography.
Takamoto, T, Kim, D, Urie, P M, Guthaner, D F, Gordon, H J, Keren, A, ...
Studies performed in 47 patients, 11 of whom underwent surgery for aneurysmectomy and 36 of whom underwent cardiac transplantation, were reviewed to assess the diagnostic accuracies of cross...
Electrocardiographic characteristics of neurocirculatory asthenia during everyday activities.
Tzivoni, D, Stern, Z, Keren, A, Stern, S
We describe the electrocardiographic changes during everyday activities recorded by ambulatory electrocardiographic monitoring in 67 patients with neurocirculatory asthenia. The findings were...
Acute myocardial infarction caused by blast injury of the chest.
Keren, A, Stessman, J, Tzivoni, D
A 51-year-old healthy man was hit in the chest by the shock-waves generated by an explosion, without being injured by any physical object. He felt immediate chest pain, but, in spite of...