Short-range magnetic correlations in spinel LiMn2O4

C. C. Yang; S. Y. Wu; W. H. Li; K. C. Lee; J. W. Lynn; R. S. Liu; C. H. Shen

doi:10.1016/S0921-5107(02)00228-3

Short-range magnetic correlations in spinel LiMn₂O₄

C. C. Yang, S. Y. Wu, W. H. Li, K. C. Lee, J. W. Lynn, R. S. Liu, C. H. Shen

Department of Physics

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Neutron diffraction, inelastic neutron scattering, and ac magnetic susceptibility measurements were performed to study the magnetic correlations of the Mn spins in a fully oxygenated lithium manganospinel Li_0.96Mn₂O₄. The compound crystallizes into a cubic structure of the Fd3̄m symmetry at 300 K and an orthorhombic Fddd symmetry at 150 K. Two separate types of magnetic phase transitions were found, signifying that the Mn³⁺ and Mn⁴⁺ spins order separately at two different temperatures. The magnetic correlations were antiferromagnetic in nature, and were observed to develop below 80 and 55 K, respectively, for the two components. Surprisingly, for both components the correlation lengths reached their maxima at 45 and 30 K, but were still short-range with correlation lengths at ∼ 120 and ∼ 40 Å, respectively.

Original language	English
Pages (from-to)	162-170
Number of pages	9
Journal	Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume	95
Issue number	2
DOIs	https://doi.org/10.1016/S0921-5107(02)00228-3
State	Published - 1 Aug 2002

Keywords

Ac magnetic susceptibility measurements
Inelastic neutron scattering
Neutron diffraction

Access to Document

10.1016/S0921-5107(02)00228-3

Cite this

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title = "Short-range magnetic correlations in spinel LiMn2O4",

abstract = "Neutron diffraction, inelastic neutron scattering, and ac magnetic susceptibility measurements were performed to study the magnetic correlations of the Mn spins in a fully oxygenated lithium manganospinel Li0.96Mn2O4. The compound crystallizes into a cubic structure of the Fd{\=3}m symmetry at 300 K and an orthorhombic Fddd symmetry at 150 K. Two separate types of magnetic phase transitions were found, signifying that the Mn3+ and Mn4+ spins order separately at two different temperatures. The magnetic correlations were antiferromagnetic in nature, and were observed to develop below 80 and 55 K, respectively, for the two components. Surprisingly, for both components the correlation lengths reached their maxima at 45 and 30 K, but were still short-range with correlation lengths at ∼ 120 and ∼ 40 {\AA}, respectively.",

keywords = "Ac magnetic susceptibility measurements, Inelastic neutron scattering, Neutron diffraction",

author = "Yang, {C. C.} and Wu, {S. Y.} and Li, {W. H.} and Lee, {K. C.} and Lynn, {J. W.} and Liu, {R. S.} and Shen, {C. H.}",

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TY - JOUR

T1 - Short-range magnetic correlations in spinel LiMn2O4

AU - Yang, C. C.

AU - Wu, S. Y.

AU - Li, W. H.

AU - Lee, K. C.

AU - Lynn, J. W.

AU - Liu, R. S.

AU - Shen, C. H.

PY - 2002/8/1

Y1 - 2002/8/1

N2 - Neutron diffraction, inelastic neutron scattering, and ac magnetic susceptibility measurements were performed to study the magnetic correlations of the Mn spins in a fully oxygenated lithium manganospinel Li0.96Mn2O4. The compound crystallizes into a cubic structure of the Fd3̄m symmetry at 300 K and an orthorhombic Fddd symmetry at 150 K. Two separate types of magnetic phase transitions were found, signifying that the Mn3+ and Mn4+ spins order separately at two different temperatures. The magnetic correlations were antiferromagnetic in nature, and were observed to develop below 80 and 55 K, respectively, for the two components. Surprisingly, for both components the correlation lengths reached their maxima at 45 and 30 K, but were still short-range with correlation lengths at ∼ 120 and ∼ 40 Å, respectively.

AB - Neutron diffraction, inelastic neutron scattering, and ac magnetic susceptibility measurements were performed to study the magnetic correlations of the Mn spins in a fully oxygenated lithium manganospinel Li0.96Mn2O4. The compound crystallizes into a cubic structure of the Fd3̄m symmetry at 300 K and an orthorhombic Fddd symmetry at 150 K. Two separate types of magnetic phase transitions were found, signifying that the Mn3+ and Mn4+ spins order separately at two different temperatures. The magnetic correlations were antiferromagnetic in nature, and were observed to develop below 80 and 55 K, respectively, for the two components. Surprisingly, for both components the correlation lengths reached their maxima at 45 and 30 K, but were still short-range with correlation lengths at ∼ 120 and ∼ 40 Å, respectively.

KW - Ac magnetic susceptibility measurements

KW - Inelastic neutron scattering

KW - Neutron diffraction

UR - http://www.scopus.com/inward/record.url?scp=0036683010&partnerID=8YFLogxK

U2 - 10.1016/S0921-5107(02)00228-3

DO - 10.1016/S0921-5107(02)00228-3

M3 - 期刊論文

AN - SCOPUS:0036683010

SN - 0921-5107

VL - 95

SP - 162

EP - 170

JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

IS - 2