COUPLED WEAK FERROMAGNETIC PARAMAGNETIC EXCITATIONS IN (GD0.5EU0.5)2CUO4

被引：13

作者：

FAINSTEIN, A

TOVAR, M

FISK, Z

机构：

[1] CSIC,INST CIENCIA MAT,E-08193 BARCELONA,SPAIN

[2] UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87544

[3] INST BALSEIRO,RA-8400 BARILOCHE,RIO NEGRO,ARGENTINA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1992年 / 4卷 / 06期

关键词：

D O I：

10.1088/0953-8984/4/6/024

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The electron paramagnetic resonance spectra of Gd3+ in single crystals of (GD0.5Eu0.5)2CuO4 show an anomalous anisotropy for temperatures below the magnetic ordering of the Cu ions (T congruent-to 280 K). We have performed a detailed experimental study of this feature, and we discuss our results in terms of a model that assumes a weak Heisenberg interaction between Cu and Gd moments. We show that that anisotropy is a consequence of the dynamic coupling of the Gd3+ paramagnetic mode with a weak ferromagnetic mode originating in the Cu magnetic moments.

引用

页码：1581 / 1593

页数：13

共 22 条

[1] MAGNETIC-PROPERTIES AND ANTIFERROMAGNETIC CU ORDERING IN PR2CUO4 [J].

ALLENSPACH, P ;

CHEONG, SW ;

DOMMANN, A ;

FISCHER, P ;

FISK, Z ;

FURRER, A ;

OTT, HR ;

RUPP, B .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1989, 77 (02) :185-191

[2] A THERMODYNAMIC THEORY OF WEAK FERROMAGNETISM OF ANTIFERROMAGNETICS [J].

DZYALOSHINSKY, I .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1958, 4 (04) :241-255

[3]

EDGAR E, 1975, J PHYS E, V8, P179

[4]

FAINSTEIN A, UNPUB

[5] ABOUT OXOCUPRATES .15. CRYSTAL-STRUCTURE OF RARE-EARTH OXOCUPRATES - LA2CUO4, GD2CUO4 [J].

GRANDE, B ;

MULLERBUSCHBAUM, H ;

SCHWEIZER, M .

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1977, 428 (01) :120-124

[6]

KITTEL C, 1963, QUANTUM THEORY SOLID, pCH3

[7] REDETERMINATION OF THE STRUCTURE OF GD2CUO4 - A SITE POPULATION ANALYSIS [J].

KUBATMARTIN, KA ;

FISK, Z ;

RYAN, RR .

ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, 1988, 44 :1518-1520

[8] STUDIES OF STATIC MAGNETIC ORDER IN ELECTRON-SUPERCONDUCTORS AND THEIR PARENT COMPOUNDS [J].

LUKE, GM ;

STERNLIEB, BJ ;

UEMURA, YJ ;

BREWER, JH ;

KADONO, R ;

KIEFL, RF ;

KREITZMAN, SR ;

RISEMAN, TM ;

GOPALAKRISHNAN, J ;

SLEIGHT, AW ;

SUBRAMANIAN, MA ;

UCHIDA, S ;

TAKAGI, H ;

TOKURA, Y .

NATURE, 1989, 338 (6210) :49-51

[9] HIGH-TEMPERATURE SUPERCONDUCTIVITY IN TH-DOPED ND2CUO4-Y [J].

MARKERT, JT ;

MAPLE, MB .

SOLID STATE COMMUNICATIONS, 1989, 70 (02) :145-147

[10] 2 NEW ELECTRON CUPRATE SUPERCONDUCTORS, PR1.85TH0.15CUO4-Y AND EU1.85CE0.15CUO4-Y, AND PROPERTIES OF ND2-XCEXO4-Y [J].

MARKERT, JT ;

EARLY, EA ;

BJORNHOLM, T ;

GHAMATY, S ;

LEE, BW ;

NEUMEIER, JJ ;

PRICE, RD ;

SEAMAN, CL ;

MAPLE, MB .

PHYSICA C, 1989, 158 (1-2) :178-182

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