Observation of spin glass transition in spinel LiCoMnO4

doi:10.1088/1674-1056/24/12/127501

Abstract Spinel LiCoMnO₄ is prepared by solid-state reaction and its magnetic properties are comprehensively studied by direct current (DC) and alternating current (AC) susceptibilities, isothermal remanent magnetizations, and magnetic hysteresis. Fitting to the Curie-Weiss law by using high-temperature zero-field-cooled susceptibility confirms a low-spin state of Co³⁺ with S=0. Both the fitting parameters first increase and then tend to be saturated at high magnetic fields through using isothermal remanent magnetizations, which suggests a spin glass transition at low temperature. AC susceptibility study also supports this conclusion since the frequency dependence of peak position and intensity follows the tendency of a spin glass transition. The origin of the spin-glass transition in LiCoMnO₄ might be attributed to a spatial segregation between non-magnetic Co³⁺ regions and spin glass ordered regions of Mn⁴⁺ ions.

Keywords: LiCoMnO₄ spin glass DC susceptibility AC susceptibility

Received: 01 June 2015
Revised: 10 August 2015
Accepted manuscript online:

PACS:	72.20.-i	(Conductivity phenomena in semiconductors and insulators)
	75.25.-j	(Spin arrangements in magnetically ordered materials (including neutron And spin-polarized electron studies, synchrotron-source x-ray scattering, etc.))
	75.40.-s	(Critical-point effects, specific heats, short-range order)

Fund: Project supported by the National Key Basic Research Program of China (Grant No. 2015CB251103), the Development Program of Science and Technology of Jilin Province, China (Grant No. 20140101093JC), and the Program of Science and Technology of Jilin City, China (Grant No. 201434006).

Corresponding Authors: Wang Chun-Zhong
E-mail: wcz@jlu.edu.cn

Cite this article:

Chen Hong (陈红), Yang Xu (杨旭), Zhang Pei-Song (张培松), Liang Lei (梁磊), Hong Yuan-Ze (洪源泽), Wei Ying-Jin (魏英进), Chen Gang (陈岗), Du Fei (杜菲), Wang Chun-Zhong (王春忠) Observation of spin glass transition in spinel LiCoMnO₄ 2015 Chin. Phys. B 24 127501

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Observation of spin glass transition in spinel LiCoMnO4

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Observation of spin glass transition in spinel LiCoMnO₄