Low to high spin-state transition induced by charge ordering in antiferromagnetic YBaCo2O5

被引：236

作者：

Vogt, T ^{[1
]}

Woodward, PM

Karen, P

Hunter, BA

Henning, P

Moodenbaugh, AR

机构：

[1] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[2] Ohio State Univ, Dept Chem, Columbus, OH 43210 USA

[3] Univ Oslo, Dept Chem, N-0315 Oslo, Norway

[4] Australian Nucl Sci & Technol Org, Menai, NSW 2234, Australia

[5] Brookhaven Natl Lab, Dept Appl Sci, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.84.2969

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The oxygen-deficient double perovskite YBaCo2O5, containing corner-linked CoO5 square pyramids as principal building units, undergoes a paramagnetic to antiferromagnetic spin ordering at 330 K. This is accompanied by a tetragonal to orthorhombic distortion. Below 220 K orbital ordering and long-range Co2+/Co3+ charge ordering occur as well as a change in the Co2+ spin state from low to high spin. This transition is shown to be very sensitive to the oxygen content of the sample. To our knowledge this is the first observation of a spin-state transition induced by long-range orbital and charge ordering.

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页码：2969 / 2972

页数：4

相关论文

共 16 条

[1] 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

[2] ELECTRON-SPECTROSCOPY STUDY OF THE SEMICONDUCTOR-METAL TRANSITION IN LA1-XSRXCOO3 [J].

CHAINANI, A ;

MATHEW, M ;

SARMA, DD .

PHYSICAL REVIEW B, 1992, 46 (16) :9976-9983

[3] MAGNETIC + ELECTRICAL ANOMALIES IN LACO03 [J].

HEIKES, RR ;

MAZELSKY, R ;

MILLER, RC .

PHYSICA, 1964, 30 (08) :1600-&

[4] THE AUSTRALIAN HIGH-RESOLUTION NEUTRON POWDER DIFFRACTOMETER [J].

HOWARD, CJ ;

BALL, CJ ;

DAVIS, RL ;

ELCOMBE, MM .

AUSTRALIAN JOURNAL OF PHYSICS, 1983, 36 (04) :507-518

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

JONKER, GH .

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

[6] CITRATE-GEL SYNTHESES IN THE Y(O)-BA(O)-CU(O) SYSTEM [J].

KAREN, P ;

KJEKSHUS, A .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1994, 77 (02) :547-552

[7] Magnetoresistance of the spin-state-transition compound La1-xSrxCoO3 [J].

Mahendiran, R ;

Raychaudhuri, AK .

PHYSICAL REVIEW B, 1996, 54 (22) :16044-16052

[8] Structural and magnetic studies of ordered oxygen-deficient perovskites LnBaCo2O5+δ, closely related to the "112" structure [J].

Maignan, A ;

Martin, C ;

Pelloquin, D ;

Nguyen, N ;

Raveau, B .

JOURNAL OF SOLID STATE CHEMISTRY, 1999, 142 (02) :247-260

[9] Magnetoresistance in the oxygen deficient LnBaCo(2)O(5.4) (Ln=Eu, Gd) phases [J].

Martin, C ;

Maignan, A ;

Pelloquin, D ;

Nguyen, N ;

Raveau, B .

APPLIED PHYSICS LETTERS, 1997, 71 (10) :1421-1423

[10] YBaMn2O5:: Crystal and magnetic structure reinvestigation [J].

Millange, F ;

Suard, E ;

Caignaert, V ;

Raveau, B .

MATERIALS RESEARCH BULLETIN, 1999, 34 (01) :1-9