Inelastic neutron scattering study on NaxCoO2 (x ∼ 0.3)

被引：1

作者：

Ohira-Kawamura, Seiko ^{[1
]}

Nagata, Takashi ^{[2
]}

Takeda, Keiko ^{[3
]}

Yoshizawa, Hideki ^{[4
]}

Kawano-Furukawa, Hazuki ^{[3
]}

机构：

[1] Ochanomizu Univ, Acad & Informat Board, Tokyo 1128610, Japan

[2] Ochanomizu Univ, Dept Phys, Tokyo 1128610, Japan

[3] Ochanomizu Univ, Grad Sch Humanities & Sci, Tokyo 1128610, Japan

[4] Univ Tokyo, ISSP, Neutron Sci Lab, Tokai, Ibaraki 3191106, Japan

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2010年 / 470卷

关键词：

Superconductivity; Sodium cobalt oxide; Neutron scattering;

D O I：

10.1016/j.physc.2009.12.046

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Inelastic neutron scattering experiments were performed on single crystals of NaxCoO2 (x similar to 0.3). The results reveal that an inelastic scattering signal appears at Delta E similar to 5.5 meV and q similar to (010) in the orthorhombic notation. Intensity of the signal decreases with increasing temperature, and disappears above 100 K. The origin of this signal is of magnetic. However, we also found the signal is absent in samples from a different batch at the same T and Q conditions. This indicates that the signal is very sensitive to condition in sample preparation. It might be attributed to Na ion ordering (disordering). (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：S691 / S692

页数：2

共 10 条

[1] Ferromagnetic in-plane spin fluctuations in NaxCoO2 observed by neutron inelastic scattering -: art. no. 197201 [J].

Boothroyd, AT ;

Coldea, R ;

Tennant, DA ;

Prabhakaran, D ;

Helme, LM ;

Frost, CD .

PHYSICAL REVIEW LETTERS, 2004, 92 (19) :197201-1

[2] Charge ordering, commensurability, and metallicity in the phase diagram of the layered NaxCoO2 -: art. no. 247001 [J].

Foo, ML ;

Wang, YY ;

Watauchi, S ;

Zandbergen, HW ;

He, T ;

Cava, RJ ;

Ong, NP .

PHYSICAL REVIEW LETTERS, 2004, 92 (24) :247001-1

[3] Spin gaps and magnetic structure of NaxCoO2 [J].

Helme, LM ;

Boothroyd, AT ;

Coldea, R ;

Prabhakaran, D ;

Stunault, A ;

McIntyre, GJ ;

Kernavanois, N .

PHYSICAL REVIEW B, 2006, 73 (05)

[4] Na-induced correlations in NaxCoO2 [J].

Marianetti, C. A. ;

Kotliar, G. .

PHYSICAL REVIEW LETTERS, 2007, 98 (17)

[5] Search for magnetic excitation spectra of NaxCoO2•yD2O -: Neutron scattering [J].

Moyoshi, Taketo ;

Yasui, Yukio ;

Soda, Minoru ;

Kobayashi, Yoshiaki ;

Sato, Masatoshi ;

Kakurai, Kazuhisa .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2006, 75 (07)

[6] Magnetic excitations of NaxCoO2•yD2O -: Neutron scattering [J].

Moyoshi, Taketo ;

Yasui, Yukio ;

Kobayashi, Yoshiaki ;

Sato, Masatoshi ;

Kakurai, Kazuhisa .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2008, 77 (07)

[7] Sodium trimer ordering on a NaxCoO2 surface [J].

Pai, Woei Wu ;

Huang, S. H. ;

Meng, Ying S. ;

Chao, Y. C. ;

Lin, C. H. ;

Liu, H. L. ;

Chou, F. C. .

PHYSICAL REVIEW LETTERS, 2008, 100 (20)

[8] Patterning of sodium ions and the control of electrons in sodium cobaltate [J].

Roger, M. ;

Morris, D. J. P. ;

Tennant, D. A. ;

Gutmann, M. J. ;

Goff, J. P. ;

Hoffmann, J. -U. ;

Feyerherm, R. ;

Dudzik, E. ;

Prabhakaran, D. ;

Boothroyd, A. T. ;

Shannon, N. ;

Lake, B. ;

Deen, P. P. .

NATURE, 2007, 445 (7128) :631-634

[9] Superconductivity in two-dimensional CoO2 layers [J].

Takada, K ;

Sakurai, H ;

Takayama-Muromachi, E ;

Izumi, F ;

Dilanian, RA ;

Sasaki, T .

NATURE, 2003, 422 (6927) :53-55

[10] Theory of sodium ordering in NaxCoO2 -: art. no. 153102 [J].

Zhang, PH ;

Capaz, RB ;

Cohen, ML ;

Louie, SG .

PHYSICAL REVIEW B, 2005, 71 (15)

← 1 →