Cluster-spin-glass behavior in layered LiNi0.4Mn0.4Co0.2O2

被引：12

作者：

Du, Fei ^{[1
]}

Bie, Xiaofei ^{[2
]}

Chen, Yan ^{[3
]}

Wei, Yingjin ^{[1
]}

Liu, Lina ^{[2
]}

Wang, Chunzhong ^{[1
]}

Zou, Guangtian ^{[1
]}

Chen, Gang ^{[1
]}

机构：

[1] Jilin Univ, Coll Phys, State Key Lab Superhard Mat, Changchun 130012, Peoples R China

[2] Jilin Univ, Coll Mat Sci & Engn, Changchun 130012, Peoples R China

[3] Jilin Univ, Sate Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2009年 / 106卷 / 05期

基金：

美国国家科学基金会;

关键词：

electrochemical electrodes; frustration; ground states; high-temperature effects; lithium compounds; magnetic particles; magnetic susceptibility; magnetisation; manganese compounds; nickel compounds; paramagnetic materials; secondary cells; short-range order; sintering; spin glasses; LITHIUM-ION BATTERIES; TRANSITION; MANGANITES;

D O I：

10.1063/1.3211869

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Layered LiNi0.4Mn0.4Co0.2O2 has been synthesized by citrate precursor method. Its magnetic properties are investigated by dc magnetization. The high-temperature susceptibility curve follows the Curie-Weiss law with Curie and Weiss constant 1.435(2) emu K/mol Oe and -112(4) K, respectively, larger than those values reported in previous researches, which possibly results from the difference in the synthesis process and sintered temperature. Our dc susceptibility differs from that of the homogeneous spin glass in that below T-irr field cooled (FC) curve continues to rise, while the FC curve is almost flat for homogeneous spin glass. Together with the de Almeida-Thouless line analysis, cluster spin glass is suggested to be the ground state of LiNi0.4Mn0.4Co0.2O2. Frustration parameter vertical bar theta vertical bar/T-f in this system is estimated to be about four, lower than the value that frustration effect is strong enough to give rise to spin glass state. This fact indicates that the cluster-spin-glass results from the short-range structure disorder rather than the geometrical frustration.

引用

页数：4

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