An electron spin resonance study of Eu doping effect in La4/3Sr5/3Mn2O7 single crystal

doi:10.1088/1674-1056/23/7/077601

Abstract The effect of Eu³⁺ ion doping in the La sites of single-crystal La_4/3Sr_5/3Mn₂O₇ was investigated. Electron spin resonance (ESR) was applied to La_4/3Sr_5/3Mn₂O₇ and (La_0.8Eu_0.2)_4/3Sr_5/3Mn₂O₇ single crystals. A phase separation and phase transitions were observed from the ESR spectra data. Between 350 K and 300 K, both paramagnetic resonance (PMR) and anisotropic ferromagnetic resonance (FMR) lines were observed in the ab plane and the c axis direction, suggesting a coexistence of the paramagnetic (PM) phase and the ferromagnetic (FM) phase. The magnetization measurement reveals a spin-glass-like behavior in single-crystal (La_0.8Eu_0.2)_4/3Sr_5/3Mn₂O₇ below the temperature of spin freezing T_f (～ 29.5 K).

Keywords: electron spin resonance manganite single crystal phase separation anisotropy

Received: 15 November 2013
Revised: 18 March 2014
Accepted manuscript online:

PACS:	76.30.-v	(Electron paramagnetic resonance and relaxation)
	75.47.Lx	(Magnetic oxides)
	75.30.Gw	(Magnetic anisotropy)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11164019 and 11064008) and the Inner Mongolia Natural Science Foundation, China (Grant Nos. NJZZ11166, NJZY10163, NJZY12202, 2011MS0101, 2011MS0108, and 2009MS0101).

Corresponding Authors: Zhao Jian-Jun
E-mail: nmzhaojianjun@126.com

About author: 76.30.-v; 75.47.Lx; 75.30.Gw

Cite this article:

He Li-Min (何利民), Ji Yu (冀钰), Wu Hong-Ye (吴鸿业), Xu Bao (徐宝), Sun Yun-Bin (孙运斌), Zhang Xue-Feng (张雪峰), Lu Yi (鲁毅), Zhao Jian-Jun (赵建军) An electron spin resonance study of Eu doping effect in La_4/3Sr_5/3Mn₂O₇ single crystal 2014 Chin. Phys. B 23 077601

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An electron spin resonance study of Eu doping effect in La4/3Sr5/3Mn2O7 single crystal

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An electron spin resonance study of Eu doping effect in La_4/3Sr_5/3Mn₂O₇ single crystal