Phase diagram and incommensurate phases in undoped manganites

被引：22

作者：

Salafranca, J ^{[1
]}

Brey, L ^{[1
]}

机构：

[1] CSIC, Inst Ciencia Mat, E-28049 Madrid, Spain

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.73.024422

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the existence of incommensurate phases in the phase diagram of the two orbital double exchange model coupled with Jahn-Teller phonons and with superexchange interactions. In agreement with experimental results, we find that undoped manganites RMnO3 (R being some rare earth element) show temperature induced commensurate-incommensurate phase transitions. In the incommensurate phase the magnetic wave vector varies with temperature. The incommensurate phase arises from the competition between the short range antiferromagnetic superexchange interaction and the long range ferromagnetic double exchange interaction.

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页数：9

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共 46 条

[1] Effects of uniaxial strain in LaMnO3 -: art. no. 115103 [J].

Ahn, KH ;

Millis, AJ .

PHYSICAL REVIEW B, 2001, 64 (11)

[2] Theoretical study of half-doped models for manganites: Fragility of CE phase with disorder, two types of colossal magnetoresistance, and charge-ordered states for electron-doped materials [J].

Aliaga, H ;

Magnoux, D ;

Moreo, A ;

Poilblanc, D ;

Yunoki, S ;

Dagotto, E .

PHYSICAL REVIEW B, 2003, 68 (10)

[3] CONSIDERATIONS ON DOUBLE EXCHANGE [J].

ANDERSON, PW ;

HASEGAWA, H .

PHYSICAL REVIEW, 1955, 100 (02) :675-681

[4] Phase separation in double-exchange systems [J].

Arovas, DP ;

Gómez-Santos, G ;

Guinea, F .

PHYSICAL REVIEW B, 1999, 59 (21) :13569-13572

[5] ISING-MODEL WITH SOLITONS, PHASONS, AND THE DEVILS STAIRCASE [J].

BAK, P ;

VONBOEHM, J .

PHYSICAL REVIEW B, 1980, 21 (11) :5297-5308

[6] Solitonic phase in manganites [J].

Brey, L ;

Littlewood, PB .

PHYSICAL REVIEW LETTERS, 2005, 95 (11)

[7] Phase diagram of half doped manganites [J].

Brey, L .

PHYSICAL REVIEW B, 2005, 71 (17)

[8] Continuous charge modulated diagonal phase in manganites [J].

Brey, L .

PHYSICAL REVIEW LETTERS, 2004, 92 (12) :127202-1

[9] Strain selection of charge and orbital ordering patterns in half-doped manganites -: art. no. 100401 [J].

Calderón, MJ ;

Millis, AJ ;

Ahn, KH .

PHYSICAL REVIEW B, 2003, 68 (10)

[10] Stabilization of A-type layered antiferromagnetic phase in LaMnO3 by cooperative Jahn-Teller deformations [J].

Capone, M ;

Feinberg, D ;

Grilli, M .

EUROPEAN PHYSICAL JOURNAL B, 2000, 17 (01) :103-109

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