Double exchange and superexchange in a ferrimagnetic half-metal -: art. no. 132403

被引：0

作者：

Loos, J ^{[1
]}

Novák, P ^{[1
]}

机构：

[1] Acad Sci Czech Republ, Inst Phys, Prague 16253 6, Czech Republic

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 13期

关键词：

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The mean field theory proposed originally by Kubo and Ohata for manganites is generalized for a ferrimagnetic half-metal and applied to the magnetite. The relevance of both the double exchange interaction and the superexchange one for the spin ordering in the conducting B sublattice of magnetite is shown. The shortcomings of the mean-field approximation are discussed.

引用

页数：4

共 16 条

[1]

[Anonymous], 1974, NONEQUILIBRIUM STAT

[2]

Brabers V.A.M., 1995, HANDB MAG M, V8, P189, DOI [10.1016/S1567-2719(05)80032-0, DOI 10.1016/S1567-2719(05)80032-0]

[3] Optical spectral weights and the ferromagnetic transition temperature of colossal-magnetoresistance manganites: Relevance of double exchange to real materials [J].

Chattopadhyay, A ;

Millis, AJ ;

Das Sarma, S .

PHYSICAL REVIEW B, 2000, 61 (16) :10738-10749

[4] SMALL-POLARON CONDUCTIVITY IN MAGNETITE [J].

DEGIORGI, L ;

WACHTER, P ;

IHLE, D .

PHYSICAL REVIEW B, 1987, 35 (17) :9259-9264

[5] MOSSBAUER STUDY OF THE HIGH-TEMPERATURE PHASE OF CO-SUBSTITUTED MAGNETITES, COXFE3-XO4 .1. X-LESS-THAN-OR-EQUAL-TO-0.04 [J].

DEGRAVE, E ;

PERSOONS, RM ;

VANDENBERGHE, RE ;

DEBAKKER, PMA .

PHYSICAL REVIEW B, 1993, 47 (10) :5881-5893

[6] THOUSANDFOLD CHANGE IN RESISTIVITY IN MAGNETORESISTIVE LA-CA-MN-O FILMS [J].

JIN, S ;

TIEFEL, TH ;

MCCORMACK, M ;

FASTNACHT, RA ;

RAMESH, R ;

CHEN, LH .

SCIENCE, 1994, 264 (5157) :413-415

[7]

Krupicka S., 1982, Ferromagnetic materials. A handbook on the properties of magnetically ordered substances. Vol.3, P189, DOI 10.1016/S1567-2719(82)03007-8

[8] QUANTUM-THEORY OF DOUBLE EXCHANGE .1. [J].

KUBO, K ;

OHATA, N .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1972, 33 (01) :21-+

[9] OPTICAL-SPECTRUM OF A HUBBARD CHAIN [J].

MALDAGUE, PF .

PHYSICAL REVIEW B, 1977, 16 (06) :2437-2446

[10] Crossover between the second- and first-order magnetic transition in ferromagnetic manganites [J].

Novák, P ;

Marysko, M ;

Savosta, MM ;

Ulyanov, AN .

PHYSICAL REVIEW B, 1999, 60 (09) :6655-6661

← 1 2 →