Raman study of the orbital-phonon coupling in LaCoO3 -: art. no. 136401

被引：129

作者：

Ishikawa, A ^{[2
]}

Nohara, J

Sugai, S

机构：

[1] Nagoya Univ, Venture Business Lab, Chikusa Ku, Nagoya, Aichi 4648601, Japan

[2] Nagoya Univ, Fac Sci, Dept Phys, Chikusa Ku, Nagoya, Aichi 4648602, Japan

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.93.136401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetic state in LaCoO3 changes from the low spin state (S=0) to the mixed state with a thermally excited intermediate spin state (IS) (S=1) above about 50 K. The partially filled e(g) orbital in the IS state has a nature of Jahn-Teller (JT) distortion. The cooperative JT distortion causes an orbital order. We found that all Raman active phonon modes are affected by the excitation of IS Co3+ ions. Especially, the JT vibration mode shows anomalous temperature dependence.

引用

页码：136401 / 1

页数：4

共 30 条

[1] Comparative study of optical phonons in the rhombohedrally distorted perovskites LaAlO3 and LaMnO3 [J].

Abrashev, MV ;

Litvinchuk, AP ;

Iliev, MN ;

Meng, RL ;

Popov, VN ;

Ivanov, VG ;

Chakalov, RA ;

Thomsen, C .

PHYSICAL REVIEW B, 1999, 59 (06) :4146-4153

[2] TEMPERATURE-INDUCED MAGNETISM IN LACOO3 [J].

ASAI, K ;

GEHRING, P ;

CHOU, H ;

SHIRANE, G .

PHYSICAL REVIEW B, 1989, 40 (16) :10982-10985

[3] Two spin-state transitions in LaCoO3 [J].

Asai, K ;

Yoneda, A ;

Yokokura, O ;

Tranquada, JM ;

Shirane, G .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1998, 67 (01) :290-296

[4] OPTICAL STUDIES OF VIBRATIONAL PROPERTIES OF DISORDERED SOLIDS [J].

BARKER, AS ;

SIEVERS, AJ .

REVIEWS OF MODERN PHYSICS, 1975, 47 :S1-S179

[5] Phonon Raman scattering in R1-xAxMnO3+δ (R = La,Pr; A = Ca,Sr) [J].

Granado, E ;

Moreno, NO ;

Garcia, A ;

Sanjurjo, JA ;

Rettori, C ;

Torriani, I ;

Oseroff, SB ;

Neumeier, JJ ;

McClellan, KJ ;

Cheong, SW ;

Tokura, Y .

PHYSICAL REVIEW B, 1998, 58 (17) :11435-11440

[6]

HEIKES RR, 1964, PHYSICA AMSTERDAM, V308, P1600

[7] Role of Jahn-Teller disorder in Raman scattering of mixed-valence manganites [J].

Iliev, MN ;

Abrashev, MV ;

Popov, VN ;

Hadjiev, VG .

PHYSICAL REVIEW B, 2003, 67 (21)

[8] SPIN-STATE AND HYPERFINE INTERACTION IN LACOO3 - NMR AND MAGNETIC-SUSCEPTIBILITY STUDIES [J].

ITOH, M ;

SUGAHARA, M ;

NATORI, I ;

MOTOYA, K .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1995, 64 (10) :3967-3977

[9] SPIN-GLASS BEHAVIOR AND MAGNETIC PHASE-DIAGRAM OF LA1-XSRXCOO3 (0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-0.5) STUDIED BY MAGNETIZATION MEASUREMENTS [J].

ITOH, M ;

NATORI, I ;

KUBOTA, S ;

MOTOYA, K .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1994, 63 (04) :1486-1493

[10] MAGNETIC AND SEMICONDUCTING PROPERTIES OF PEROVSKITES CONTAINING MANGANESE AND COBALT [J].

JONKER, GH .

JOURNAL OF APPLIED PHYSICS, 1966, 37 (03) :1424-&

← 1 2 3 →