Abnormal magnetic behaviors induced by the antisite phase boundary in La2NiMnO6

doi:10.1088/1674-1056/22/8/087601

Abstract The ferromagnetic semiconductor La₂NiMnO₆ (LNMO) has recently received much attention due to its high Curie temperature (T_C ～ 280 K), which is close to room temperature. We prepared single-phase LNMO polycrystalline samples and investigated the temperature-and field-dependent magnetic behaviors of bulk LNMO. Between T_C and T^*=300 K, we observed upward and downward deviations from the Curie-Weiss law for high and low magnetic fields, respectively. From the electron spin resonance results, we can exclude the existence of the Griffiths phase. On the contrary, our results indicate that the abnormal magnetic behaviors might be induced by antisite phase boundaries with antiferromagnetic interaction.

Keywords: antisite phase boundary (APB) La₂NiMnO₆ electron spin resonance (ESR)

Received: 22 April 2013
Revised: 17 May 2013
Accepted manuscript online:

PACS:	76.30.-v	(Electron paramagnetic resonance and relaxation)
	75.30.Kz	(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
	75.60.Ej	(Magnetization curves, hysteresis, Barkhausen and related effects)

Fund: Project supported by the National Key Basic Research Program of China (Grant No. 2011CB921801) and the National Natural Science Foundation of China (Grant Nos. 11074293 and 51021061).

Corresponding Authors: Sun Young
E-mail: youngsun@iphy.ac.cn

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Zhao Yue-Lei (赵月雷), Chai Yi-Sheng (柴一晟), Pan Li-Qing (潘礼庆), Sun Young (孙阳) Abnormal magnetic behaviors induced by the antisite phase boundary in La₂NiMnO₆ 2013 Chin. Phys. B 22 087601

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Abnormal magnetic behaviors induced by the antisite phase boundary in La2NiMnO6

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Abnormal magnetic behaviors induced by the antisite phase boundary in La₂NiMnO₆