Local lattice disorder in the geometrically frustrated spin-glass pyrochlore Y2Mo2O7

被引：88

作者：

Booth, CH ^{[1
]}

Gardner, JS

Kwei, GH

Heffner, RH

Bridges, F

Subramanian, MA

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA

[2] Univ Calif Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[3] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA

[4] Dupont Co, Cent Res & Dev, Expt Stn, Wilmington, DE 19880 USA

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.62.R755

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The geometrically frustrated spin-glass Y2Mo2O7 has been widely considered to be crystallographically ordered with a unique nearest-neighbor magnetic exchange interaction, J. To test this assertion, we present x-ray-absorption fine-structure results for the Mo and Y K edges as a function of temperature and compare them to results from a well-ordered pyrochlore, Tl2Mn2O7. We find that the Mo-Mo pair distances are significantly disordered at approximately right angles to the Y-Mo pairs. These results strongly suggest that lattice disorder nucleates thr spin-glass phase in this material.

引用

页码：R755 / R758

页数：4

共 23 条

[1] ORDERING AND ANTIFERROMAGNETISM IN FERRITES [J].

ANDERSON, PW .

PHYSICAL REVIEW, 1956, 102 (04) :1008-1013

[2]

BILLINGE SJL, COMMUNICATION

[3] Direct relationship between magnetism and MnO6 distortions in La1-xCaxMnO3 [J].

Booth, CH ;

Bridges, F ;

Kwei, GH ;

Lawrence, JM ;

Cornelius, AL ;

Neumeier, JJ .

PHYSICAL REVIEW LETTERS, 1998, 80 (04) :853-856

[4] AN ITERATIVE APPROACH TO ATOMIC BACKGROUND REMOVAL IN XAFS DATA-ANALYSIS [J].

BRIDGES, F ;

BOOTH, CH ;

LI, GG .

PHYSICA B, 1995, 208 (1-4) :121-124

[5]

Crozier E.D., 1988, X-ray Absorption: Principles, applications, techniques of EXAFS, SEXAFS and XANES Eds, P373

[6] Muon spin relaxation investigation of the spin dynamics of geometrically frustrated antiferromagnets Y2Mo2O7 and Tb2Mo2O7 [J].

Dunsiger, SR ;

Kiefl, RF ;

Chow, KH ;

Gaulin, BD ;

Gingras, MJP ;

Greedan, JE ;

Keren, A ;

Kojima, K ;

Luke, GM ;

MacFarlane, WA ;

Raju, NP ;

Sonier, JE ;

Uemura, YJ ;

Wu, WD .

PHYSICAL REVIEW B, 1996, 54 (13) :9019-9022

[7]

EISENBERGER P, 1979, SOLID STATE COMMUN, V29, P418

[8]

Fisher K.H., 1991, Spin glasses

[9] Glassy statics and dynamics in the chemically ordered pyrochlore anti-ferromagnet Y2Mo2O7 [J].

Gardner, JS ;

Gaulin, BD ;

Lee, SH ;

Broholm, C ;

Raju, NP ;

Greedan, JE .

PHYSICAL REVIEW LETTERS, 1999, 83 (01) :211-214

[10]

GAULIN BD, 1994, MAGNETIC SYSTEMS COM

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