Zobrazeno 1 - 10
of 28
pro vyhledávání: '"M K, Haas"'
Autor:
Solène Guitteny, R. J. Cava, Laura Bovo, Hannu Mutka, Michel Kenzelmann, S. Petit, L. P. Regnault, M. Ruminy, Paul Steffens, Jacques Ollivier, Martin Boehm, M. K. Haas, Tom Fennell, Uwe Stuhr, B. Roessli, C. Decorse, J. Robert, I. Mirebeau, Jonathan S. White
Publikováno v:
Physical Review B. 99
Tb2Ti2O7 presents an ongoing conundrum in the study of rare-earth pyrochlores. Despite the expectation that it should be the prototypical unfrustrated noncollinear Ising antiferromagnet on the pyrochlore lattice, it presents a puzzling correlated sta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f210728f3f4fc45bc73da08c2938fd31
https://doi.org/10.1103/physrevb.99.224431
https://doi.org/10.1103/physrevb.99.224431
Autor:
K. Inumaru, K. A. Regan, Robert J. Cava, Michael A. Hayward, M. K. Haas, Arthur P. Ramirez, T. He, N. Rogado
The effects of partial substitution of Cu and Co for Ni in the intermetallic perovskite superconductor MgCNi3 are reported. Calculation of the expected electronic density of states suggests that electron (Cu) and hole (Co) doping should have differen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::20f8c0fab5a04871ef17f3c508ea61e0
https://doi.org/10.1016/s0038-1098(01)00303-9
https://doi.org/10.1016/s0038-1098(01)00303-9
Loss of superconductivity with the addition of Al to MgB2 and a structural transition in Mg1-x AlxB2
Autor:
Michael A. Hayward, Sergio Paulo Martins Loureiro, M. K. Haas, T. He, N. Rogado, K. A. Regan, K. Inumaru, Robert J. Cava, Peter G. Khalifah, Joanna S.G. Slusky, H. W. Zandbergen
The basic magnetic and electronic properties of most binary compounds have been well known for decades. The recent discovery of superconductivity at 39 K in the simple binary ceramic compound magnesium diboride, MgB2, was therefore surprising. Indeed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84b69c17c7c03dac59013ec90a9f14af
https://ora.ox.ac.uk/objects/uuid:08dcb428-d6f0-49a5-965e-c8ebb0cf23eb
https://ora.ox.ac.uk/objects/uuid:08dcb428-d6f0-49a5-965e-c8ebb0cf23eb
Autor:
Uwe Stuhr, Björn Wehinger, Kazuya Kamazawa, Michel Kenzelmann, Robert J. Cava, M. Ruminy, Tom Fennell, D. T. Adroja, Denis Sheptyakov, Antonio Cervellino, D. Prabakharan, Ekaterina Pomjakushina, Nicola A. Spaldin, M. K. Haas, M. Núñez Valdez, Laura Bovo, Kazuki Iida, Alexei Bosak
Publikováno v:
Physical Review B. 93
We present a model of the lattice dynamics of the rare-earth titanate pyrochlores R2Ti2O7 (R=Tb,Dy,Ho), which are important materials in the study of frustrated magnetism. The phonon modes are obtained by density functional calculations, and these pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::faaf00733ed21009c9b3ecc26148b3ea
https://doi.org/10.1103/physrevb.93.214308
https://doi.org/10.1103/physrevb.93.214308
Autor:
Robert J. Cava, M. K. Haas, Antonio Cervellino, Michel Kenzelmann, Uwe Stuhr, Laura Bovo, M. Ruminy, Tom Fennell, Ekaterina Pomjakushina
Publikováno v:
Physical Review B. 93
Recent experimental results have emphasized two aspects of Tb2Ti2O7 which have not been taken into account in previous attempts to construct theories of Tb2Ti2O7: the role of small levels of quenched structural disorder, which appears to control the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74b20539ef99c86723569a3426fce69a
https://doi.org/10.1103/physrevb.93.144407
https://doi.org/10.1103/physrevb.93.144407
Publikováno v:
Journal of Materials Research. 20:3214-3223
Hydrogen isotherms on a variety of single-walled carbon nanotube (SWNT) samples were measured using a differential pressure adsorption apparatus, which provides highly accurate data. A number of these SWNT samples were modified by a non-destructive c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71b1de372dd1c58065ab58cf45e58ab3
https://doi.org/10.1557/jmr.2005.0398
https://doi.org/10.1557/jmr.2005.0398
Autor:
Mark Rzchowski, T. W. Heitmann, N. Rogado, C. B. Eom, Michael A. Hayward, J. E. Giencke, D. M. Kim, K. A. Regan, M. K. Haas, J. H. Choi, D. C. Larbalestier, Sang Don Bu, T. He, R. J. Cava, Peter G. Khalifah, Joanna S.G. Slusky
Publikováno v:
Superconductor Science and Technology. 17:237-242
We report scanning tunnelling spectroscopy (STS) measurements of the gap properties of both ceramic MgB2 and c-axis oriented epitaxial MgB2 thin films. Both show a temperature dependent zero bias conductance peak and evidence for two superconducting
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b2abb964ef76f3e76b49e443c72fa6e
https://doi.org/10.1088/0953-2048/17/2/001
https://doi.org/10.1088/0953-2048/17/2/001
Publikováno v:
Journal of Physics: Condensed Matter. 15:907-914
The spin-1/2 Cu2+ ions in beta-Cu3V2O8 occupy the sites of a Kagome-staircase lattice, an anisotropic variant of the Kagome net: buckled layers and imbedded plaquettes of three edge-shared CuO4 squares break the ideal Kagome symmetry. Susceptibility
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c6a02282d473983e25eb33f29b9a959c
https://doi.org/10.1088/0953-8984/15/6/317
https://doi.org/10.1088/0953-8984/15/6/317
Publikováno v:
Journal of Solid State Chemistry. 169:24-34
The crystal structures of Bi2Ru2O7 and Bi 1.6 M 0.4 Ru 2 O 7 (M= Cu,Co ) pyrochlores are determined by Rietveld refinement of neutron powder diffraction data collected between 300 and 12 K . An appreciable oxygen non-stoichiometry, with no vacancy or
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::01704f92942aee61ed786f5fc6a548f4
https://doi.org/10.1016/s0022-4596(02)00007-5
https://doi.org/10.1016/s0022-4596(02)00007-5
Autor:
Hannu Mutka, Oksana Zaharko, Michel Kenzelmann, M. K. Haas, M. Ruminy, Tom Fennell, Uwe Stuhr, Laura Bovo, Jacques Ollivier, Robert J. Cava, B. Roessli, Antonio Cervellino
Publikováno v:
Physical Review Letters. 112
At low temperatures, Tb2Ti2O7 enters a spin liquid state, despite expectations of magnetic order and/or a structural distortion. Using neutron scattering, we have discovered that in this spin liquid state an excited crystal field level is coupled to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e42807d8eb690ffffbd3239c61151345
https://doi.org/10.1103/physrevlett.112.017203
https://doi.org/10.1103/physrevlett.112.017203