Neutron spin echo studies of the glass-like pyrochlore Y2Mo2O7

被引:12
作者
Gardner, JS
Ehlers, G
Heffner, RH
Mezei, F
机构
[1] Natl Res Council Canada, Chalk River Labs, NPMR, Chalk River, ON K0J 1J0, Canada
[2] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France
[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[4] Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany
关键词
magnetic frustration; neutron scattering; pyrochlore;
D O I
10.1016/S0304-8853(00)00770-8
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We performed neutron spin echo measurements. on the geometrically frustrated antiferromagnet Y2Mo2O7 to reveal the magnetic nature of this glass-like system close to the freezing temperature. Tf. Diffuse magnetic scattering S(Q), indicative of spatial correlations. were observed to peak at a wave vector, Q approximate to 0.45 Angstrom (-1) below 25 K. The normalized intermediate scattering function, S(Q,t)/S(Q,0), was measured as a function of temperature and Q. This provides evidence of the dynamics within the system and reveals at least two relaxation processes above and below T-f approximate to 22.5 K. Crown Copyright (C) 2001 Published by Elsevier Science B.V. All rights reserved.
引用
收藏
页码:460 / 462
页数:3
相关论文
共 15 条
[1]   ORDERING AND ANTIFERROMAGNETISM IN FERRITES [J].
ANDERSON, PW .
PHYSICAL REVIEW, 1956, 102 (04) :1008-1013
[2]   Pyrochlore antiferromagnet: A three-dimensional quantum spin liquid [J].
Canals, B ;
Lacroix, C .
PHYSICAL REVIEW LETTERS, 1998, 80 (13) :2933-2936
[3]   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
[4]  
Fisher K.H., 1991, Spin glasses
[5]   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
[6]   Static critical behavior of the spin-freezing transition in the geometrically frustrated pyrochlore antiferromagnet Y2Mo2O7 [J].
Gingras, MJP ;
Stager, CV ;
Raju, NP ;
Gaulin, BD ;
Greedan, JE .
PHYSICAL REVIEW LETTERS, 1997, 78 (05) :947-950
[7]  
MEZEI F, 1990, J MAGN MAGN MATER, V2, P7873
[8]   Low-temperature properties of classical geometrically frustrated antiferromagnets [J].
Moessner, R ;
Chalker, JT .
PHYSICAL REVIEW B, 1998, 58 (18) :12049-12062
[9]   Properties of a classical spin liquid: The Heisenberg pyrochlore antiferromagnet [J].
Moessner, R ;
Chalker, JT .
PHYSICAL REVIEW LETTERS, 1998, 80 (13) :2929-2932
[10]   MAGNETIC-SUSCEPTIBILITY AND SPECIFIC-HEAT STUDIES OF SPIN-GLASS-LIKE ORDERING IN THE PYROCHLORE COMPOUNDS R2MO2O7 (R = Y, SM, OR GD) [J].
RAJU, NP ;
GMELIN, E ;
KREMER, RK .
PHYSICAL REVIEW B, 1992, 46 (09) :5405-5411