Volume collapse in LaMnO3 studied using an anisotropic Potts model

被引：10

作者：

Ahmed, Mahrous R. ^{[1
,2
]}

Gehring, G. A. ^{[2
]}

机构：

[1] Sohag Univ, Dept Phys, Fac Sci, Sohag 82534, Egypt

[2] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 17期

关键词：

bond lengths; lanthanum compounds; Potts model; JAHN-TELLER TRANSITION; ANTIFERROMAGNETIC POTTS; LATTICE-DISTORTIONS; INTERPLAY;

D O I：

10.1103/PhysRevB.79.174106

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the volume collapse occurring in LaMnO3 unit cell using the anisotropic Potts model modified by two types of anisotropic interactions which has been used to study the behavior of the orbital-ordering configurations with temperature. The bond lengths are related to the occupation of the orbits. We have shown that the collapse is due to the change of Mn-O bonds as the temperature is raised through the transition. These results are in good agreement with the recently published experimental results.

引用

页数：5

共 30 条

[1] Potts model for the distortion transition in LaMnO3 [J].

Ahmed, Mahrous R. ;

Gehring, G. A. .

PHYSICAL REVIEW B, 2006, 74 (01)

[2] The phase diagram of an anisotropic Potts model [J].

Ahmed, MR ;

Gehring, GA .

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 2005, 38 (19) :4047-4067

[3] Jahn-Teller effect on orbital ordering and dynamics in ferromagnetic LaMnO3 [J].

Bala, J ;

Oles, AM .

PHYSICAL REVIEW B, 2000, 62 (10) :R6085-R6088

[4] ANTI-FERROMAGNETIC POTTS AND ASHKIN-TELLER MODELS IN 3 DIMENSIONS [J].

BANAVAR, JR ;

GREST, GS ;

JASNOW, D .

PHYSICAL REVIEW B, 1982, 25 (07) :4639-4650

[5]

Bozin ES, 2007, Z KRISTALLOGR, P429

[6] Volume contraction and resistivity drop at the Jahn-Teller transition in La1-xCaxMnO3 -: art. no. 094444 [J].

Chatterji, T ;

Riley, D ;

Fauth, F ;

Mandal, P ;

Ghosh, B .

PHYSICAL REVIEW B, 2006, 73 (09)

[7] Volume collapse in LaMnO3 caused by an orbital order-disorder transition -: art. no. 052406 [J].

Chatterji, T ;

Fauth, F ;

Ouladdiaf, B ;

Mandal, P ;

Ghosh, B .

PHYSICAL REVIEW B, 2003, 68 (05)

[8] Orbital order parameter in La0.95Sr0.05MnO3 probed by electron spin resonance -: art. no. 214427 [J].

Deisenhofer, J ;

Kochelaev, BI ;

Shilova, E ;

Balbashov, AM ;

Loidl, A ;

von Nidda, HAK .

PHYSICAL REVIEW B, 2003, 68 (21)

[9] Interplay between magnetism and lattice distortions in LaMn1-xGaxO3 -: art. no. 168 [J].

Farrell, J ;

Gehring, GA .

NEW JOURNAL OF PHYSICS, 2004, 6 :1-12

[10] Electronic origin of magnetic and orbital ordering in insulating LaMnO3 [J].

Feiner, LF ;

Oles, AM .

PHYSICAL REVIEW B, 1999, 59 (05) :3295-3298

← 1 2 3 →