Local symmetry breaking and spin-phonon coupling in SmCrO3 orthochromite

被引：43

作者：

El Amrani, M. ^{[1
]}

Zaghrioui, M. ^{[1
]}

Ta Phuoc, V. ^{[1
]}

Gervais, F. ^{[1
]}

Massa, Nestor E. ^{[2
]}

机构：

[1] Univ Tours, IUT Blois, GREMAN CNRS UMR 7347, F-41029 Blois, France

[2] Natl Univ La Plata, Lab Nacl Invest & Serv Espect Opt, Ctr CEQUINOR, RA-1900 La Plata, Buenos Aires, Argentina

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2014年 / 361卷

关键词：

Multiferroic; Orthochromite; Raman scattering; Infrared reflectivity; RARE-EARTH ORTHOCHROMITES; MAGNETIC-PROPERTIES; PHASE-TRANSITION; RAMAN-SPECTRA; REORIENTATION; YCRO3;

D O I：

10.1016/j.jmmm.2014.02.057

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Raman scattering and infrared reflectivity performed on polycrystalline SmCrO3 support strong influence of the antiferromagnetic order on phonon modes. Both measurements show softening of some modes below T-N. Such a behavior is explained by spin phonon coupling in this compound. Furthermore, temperature dependence of the infrared spectra has demonstrated important changes compared to the Raman spectra, suggesting strong structural modifications due to the cation displacements rather to those of the oxygenion. Our results reveal that polar distortions originating in local symmetry breaking, i.e. local non-centrosymmetry, resulting in Cr off-centring. (C) 2014 Elsevier B. V. Allrights reserved.

引用

页码：1 / 6

页数：6

共 39 条

[1] SOME NEUTRON-DIFFRACTION INVESTIGATIONS AT NUCLEAR CENTER OF GRENOBLE [J].

BERTAUT, EF ;

BASSI, G ;

BUISSON, G ;

BURLET, P ;

CHAPPERT, J ;

DELAPALME, A ;

MARESCHAL, J ;

ROULT, G ;

ALEONARD, R ;

PAUTHENET, R ;

REBOUILLAT, JP .

JOURNAL OF APPLIED PHYSICS, 1966, 37 (03) :1038-+

[2] Spin-phonon coupling in multiferroic RCrO3 (R-Y, Lu, Gd, Eu, Sm): A Raman study [J].

Bhadram, Venkata Srinu ;

Rajeswaran, B. ;

Sundaresan, A. ;

Narayana, Chandrabhas .

EPL, 2013, 101 (01)

[3] CRYSTALLOGRAPHIC STUDIES OF PEROVSKITE-LIKE COMPOUNDS .4. RARE EARTH SCANDATES, VANADITES, GALLIATES, ORTHOCHROMITES [J].

GELLER, S .

ACTA CRYSTALLOGRAPHICA, 1957, 10 (04) :243-248

[4] Lattice dynamics of BaTiO3, PbTiO3, and PbZrO3:: A comparative first-principles study [J].

Ghosez, P ;

Cockayne, E ;

Waghmare, UV ;

Rabe, KM .

PHYSICAL REVIEW B, 1999, 60 (02) :836-843

[5] MAGNETIZATION STUDIES IN RARE-EARTH ORTHOCHROMITES .5. TBCRO-3 AND PRCRO-3 [J].

GORDON, JD ;

HORNREICH, RM ;

SHTRIKMAN, S ;

WANKLYN, BM .

PHYSICAL REVIEW B, 1976, 13 (07) :3012-3017

[6] 2ND-ORDER NATURE OF SPIN-REORIENTATION PHASE-TRANSITION IN SMCRO3 [J].

GORODETSKY, G ;

HORNREICH, RM ;

SHAFT, S ;

SHARON, B ;

SHAULOV, A ;

WANKLYN, BM .

PHYSICAL REVIEW B, 1977, 16 (01) :515-521

[7] Magnetic ordering effects in the Raman spectra of La1-xMn1-xO3 [J].

Granado, E ;

García, A ;

Sanjurjo, JA ;

Rettori, C ;

Torriani, I ;

Prado, F ;

Sánchez, RD ;

Caneiro, A ;

Oseroff, SB .

PHYSICAL REVIEW B, 1999, 60 (17) :11879-11882

[8] MAGNETO-OPTICAL AND MAGNETIZATION STUDIES IN RARE-EARTH ORTHOCHROMITES .4. ERCRO3 [J].

HASSON, A ;

HORNREICH, RM ;

KOMET, Y ;

WANKLYN, BM ;

YAEGER, I .

PHYSICAL REVIEW B, 1975, 12 (11) :5051-5067

[9] MAGNETIZATION STUDIES IN RARE-EARTH ORTHOCHROMITES .7. LUCRO-3 [J].

HORNREICH, RM ;

SHTRIKMAN, S ;

WANKLYN, BM ;

YAEGER, I .

PHYSICAL REVIEW B, 1976, 13 (09) :4046-4052

[10] MAGNETO-OPTICAL AND MAGNETIZATION STUDIES IN RARE-EARTH ORTHOCHROMITES .6. NDCRO3 [J].

HORNREICH, RM ;

KOMET, Y ;

NOLAN, R ;

WANKLYN, BM ;

YAEGER, I .

PHYSICAL REVIEW B, 1975, 12 (11) :5094-5104

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