Emergence of ferromagnetism and Jahn-Teller distortion in LaMn1-xCrxO3 (x < 0.15)

被引：18

作者：

Ramos, Aline Y. ^{[1
,2
]}

Tolentino, Helio C. N. ^{[1
,2
]}

Soares, Marcio M. ^{[1
,2
]}

Grenier, Stephane ^{[1
,2
]}

Bunau, Oana ^{[1
,2
]}

Joly, Yves ^{[1
,2
]}

Baudelet, Francois ^{[3
]}

Wilhelm, Fabrice ^{[4
]}

Rogalev, Andrei ^{[4
]}

Souza, Raquel A. ^{[5
]}

Souza-Neto, Narcizo M. ^{[5
]}

Proux, Olivier ^{[6
]}

Testemale, Denis ^{[1
,2
]}

Caneiro, Alberto ^{[7
,8
]}

机构：

[1] CNRS, Inst Neel, Boite Postale 166, F-38042 Grenoble 9, France

[2] UJF, F-38042 Grenoble 9, France

[3] Synchrotron SOLEIL, F-91192 Gif Sur Yvette, France

[4] European Synchrotron Radiat Facil ESRF, F-38043 Grenoble, France

[5] Lab Nacl Luz Sincrotron, BR-13084971 Campinas, SP, Brazil

[6] Observ Sci Univ OSUG Grenoble, F-38051 Grenoble, France

[7] Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Argentina

[8] Univ Nacl Cuyo, RA-8400 San Carlos De Bariloche, Argentina

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 22期

关键词：

MAGNETIC-STRUCTURES; CIRCULAR-DICHROISM; K-EDGE; LAMN0.9CR0.1O3+DELTA; SUBSTITUTION; DIFFRACTION; METAL;

D O I：

10.1103/PhysRevB.87.220404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The emergence of a ferromagnetic component in LaMnO3 with low Cr-for-Mn substitution has been studied by x-ray absorption spectroscopy and x-ray magnetic circular dichroism at the Mn and Cr K edges. The local magnetic moment strengths for Mn and Cr are proportional to each other and follow the macroscopic magnetization. The net ferromagnetic components of Cr3+ and Mn3+ are found antiferromagnetically coupled. Unlike hole doping by La site substitution, the inclusion of Cr3+ ions up to x = 0.15 does not decrease the Jahn-Teller (JT) distortion and consequently does not significantly affect the orbital ordering. This demonstrates that the emergence of the ferromagnetism is not related to JT weakening and likely arises from a complex orbital mixing.

引用

页数：5

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Emergence of ferromagnetism and Jahn-Teller distortion in LaMn1-xCrxO3 (x &lt; 0.15)

Emergence of ferromagnetism and Jahn-Teller distortion in LaMn1-xCrxO3 (x < 0.15)