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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/4617

Title: Compressibility of the MgB_2 superconductor
Authors: Prassides, K.
Iwasa, Y.
Ito, T.
H. Chi, Dam
Uehara, K.
Nishibori, E.
Takata, M.
Sakata, M.
Ohishi, Y.
Shimomura,O.
Muranaka, T.
Akimitsu, J.
Issue Date: 2001-06-14
Publisher: American Physical Society
Magazine name: Physical Review B
Volume: 64
Number: 1
Start page: 012509-1
End page: 012509-4
DOI: 10.1103/PhysRevB.64.012509
Abstract: Considerable excitement has been caused recently by the discovery that the binary-boride system with stoichiometry MgB_2 is superconducting at the remarkably high temperature of 39 K [J. Nagamatsu, N. Nakagawa, T. Muranaka, Y. Zenitani, and J. Akimitsu, Nature 410, 63 (2001)]. This potentially opens the way to even higher-T_c values in a new family of superconductors with unexpectedly simple composition and structure. The simplicity in the electronic and crystal structures could allow the understanding of the physics of high-T_c superconductivity without the presence of the multitude of complicated features, associated with the cuprates. Synchrotron x-ray diffraction was used to measure the isothermal compressibility of MgB_2, revealing a stiff tightly packed incompressible solid with only moderate bonding anisotropy between intralayer and interlayer directions. These results, combined with the pressure evolution of the superconducting transition temperature, T_c, establish its relation to the B and Mg bonding distances over a broad range of values.
Rights: K. Prassides, Y. Iwasa, T. Ito, Dam H.Chi, K. Uehara, E. Nishibori, M. Takata, M. Sakata, Y. Ohishi, O. Shimomura, T. Muranaka, and J. Akimitsu., Physical Review B, 64(1), 2001, 012509-1-012509-4. Copyright 2001 by the American Physical Society. http://link.aps.org/abstract/PRB/v64/e012509
URI: http://hdl.handle.net/10119/4617
Material Type: publisher
Appears in Collections:a10-1. 雑誌掲載論文 (Journal Articles)

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