Zobrazeno 1 - 10
of 142
pro vyhledávání: '"Rogado, N."'
Autor:
Fabrizi, F., Walker, H. C., Paolasini, L., de Bergevin, F., Fennell, T., Rogado, N., Cava, R. J., Wolf, Th., Kenzelmann, M., McMorrow, D. F.
The magnetic structure of multiferroic Ni$_3$V$_2$O$_8$ has been investigated using non-resonant X-ray magnetic scattering. Incident circularly polarized X-rays combined with full polarization analysis of the scattered beam is shown to yield high sen
Externí odkaz:
http://arxiv.org/abs/1004.4547
Autor:
Cabrera, I., Kenzelmann, M., Lawes, G., Chen, Y., Chen, W. C., Erwin, R., Gentile, T. R., Leão, J. B., Lynn, J. W., Rogado, N., Cava, R. J., Broholm, C.
Publikováno v:
Phys. Rev. Lett. 103, 087201 (2009)
Electric control of multiferroic domains is demonstrated through polarized magnetic neutron diffraction. Cooling to the cycloidal multiferroic phase of Ni3V2O8 in an electric field (E) causes the incommensurate Bragg reflections to become neutron spi
Externí odkaz:
http://arxiv.org/abs/0904.2603
Autor:
Rai, R. C., Cao, J., Brown, S., Musfeldt, J. L., Kasinathan, D., Singh, D. J., Lawes, G., Rogado, N., Cava, R. J., Wei, X.
We use a combination of optical spectra, first principles calculations, and energy dependent magneto-optical measurements to elucidate the electronic structure and to study the phase diagram of Ni$_3$V$_2$O$_8$. We find a remarkable interplay of magn
Externí odkaz:
http://arxiv.org/abs/cond-mat/0610835
Autor:
Chen, Y., Lynn, J. W., Huang, Q., Woodward, F. M., Yildirim, T., Lawes, G., Ramirez, A. P., Rogado, N., Cava, R. J., Aharony, A., Entin-Wohlman, O., Harris, A. B.
Co3V2O8 (CVO) has a geometrically frustrated magnetic lattice, a Kagome staircase. The crystal structure consists of two inequivalent Co sites, one-dimensional chains of Co(2) spine sites, linked by Co(1) cross-tie sites. Neutron powder diffraction h
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607533
Autor:
Kenzelmann, M., Harris, A. B., Aharony, A., Entin-Wohlman, O., Yildirim, T., Huang, Q., Park, S., Lawes, G., Broholm, C., Rogado, N., Cava, R. J., Kim, K. H., Jorge, G., Ramirez, A. P.
Publikováno v:
Phys. Rev. B 74, 014429 (2006).
We present powder and single-crystal neutron diffraction and bulk measurements of the Kagome-staircase compound Ni3V2O8 (NVO) in fields up to 8.5T applied along the c-direction. (The Kagome plane is the a-c plane.) This system contains two types of N
Externí odkaz:
http://arxiv.org/abs/cond-mat/0510386
Autor:
Lawes, G., Harris, A. B., Kimura, T., Rogado, N., Cava, R. J., Aharony, A., Entin-Wohlman, O., Yildrim, T., Kenzelmann, M., Broholm, C., Ramirez, A. P.
Publikováno v:
Phys. Rev. Lett. 95, 087205 (2005)
We show that for Ni$_3$V$_2$O$_8$ long-range ferroelectric and incommensurate magnetic order appear simultaneously in a single phase transition. The temperature and magnetic field dependence of the spontaneous polarization show a strong coupling betw
Externí odkaz:
http://arxiv.org/abs/cond-mat/0503385
Autor:
Lawes, G., Kenzelmann, M., Rogado, N., Kim, K. H., Jorge, G. A., Cava, R. J., Aharony, A., Entin-Wohlman, O., Harris, A. B., Yildirim, T., Huang, Q. Z., Park, S., Broholm, C., Ramirez, A. P.
We present thermodynamic and neutron data on Ni_3V_2O_8, a spin-1 system on a kagome staircase. The extreme degeneracy of the kagome antiferromagnet is lifted to produce two incommensurate phases at finite T - one amplitude modulated, the other helic
Externí odkaz:
http://arxiv.org/abs/cond-mat/0407016
Autor:
Hasan, M. Z., Chuang, Y. -D., Kuprin, A. P., Kong, Y., Qian, D., Li, Y. W., Mesler, B. L., Hussain, Z., Fedorov, A. V., Kimmerling, R., Rotenberg, E., Rossnagel, K., Koh, H., Rogado, N. S., Foo, M. L., Cava, R. J.
Publikováno v:
Phys. Rev. Lett. 92, 246402 (2004)
We present an angle-resolved photoemission study of Na0.7CoO2, the host cobaltate of the NaxCoO2.yH2O series. Our results show a large hexagonal-like hole-type Fermi surface, an extremely narrow strongly renormalized quasiparticle band and a small Fe
Externí odkaz:
http://arxiv.org/abs/cond-mat/0308438
Autor:
Foo, M. L., Schaak, R. E., Miller, V. L., Klimczuk, T., Rogado, N. S., Wang, Yayu, Lau, G. C., Craley, C., Zandbergen, H. W., Ong, N. P., Cava, R. J.
Publikováno v:
Solid State Communications, 127 (2003) 33
The layered sodium cobalt oxyhydrate superconductor Na0.3CoO2*1.4H2O is shown through X-ray diffraction and thermogravimetric studies to be one of a series of hydrated phases of Na0.3CoO2. Further, it is shown that the material is exceptionally sensi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0304464
Autor:
Heitmann, T. W., Bu, S. D., Kim, D. M., Choi, J. H., Giencke, J., Eom, C. B., Regan, K. A., Rogado, N., Hayward, M. A., He, T., Slusky, J. S., Khalifah, P., Haas, M., Cava, R. J., Larbalestier, D. C, Rzchowski, M. S.
We report scanning tunneling 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 g
Externí odkaz:
http://arxiv.org/abs/cond-mat/0212194