NDLI: Evidence of Griffiths Phase and Antiferromagnetic State in Bi-Doped LaMnO $$

Content Provider	Springer Nature Link
Author	Zhang, Hong guang Xie, Liang Li, Yong tao Dong, Xue guang Li, Qi
Copyright Year	2014
Abstract	The magnetic behavior of La $$_{1-x}$$ Bi $$_{x}$$ MnO $$_{3}$$ ( $$x = 0.20$$ , 0.25, 0.30, and 0.40) has been studied, with a Griffiths phase in particular for the sample $$x = 0.4$$ with an isovalent Mn $$^{3+}$$ for the whole system. The X-ray photoemission spectra (XPS) of each element for all prepared samples of La $$_{1-x}$$ Bi $$_{x}$$ MnO $$_{3}$$ are the same, and have no obvious change due to the Bi ions doping. The Mn 2 $$p$$ core level XPS shows that the valence state of Mn ion is 3+, and stays in isovalent Mn $$^{3+}$$ with increasing doping concentration. Zero-field-cooling and field-cooling curves demonstrate a traditional ferromagnetic to paramagnetic phase transition for all samples, but a special step-like behavior for $$x = 0.4$$ . For $$x = 0.4$$ , the Griffiths phase is observed above the Curie temperature $$ T_{C}$$ , which is shown by the evidence of the downturn deviation from the Curie–Weiss linear law and the demonstration of a ferromagnetic cluster revealed by an isothermal magnetization and an Arrott plot. Below $$T_{C}$$ , an obvious antiferromagnetic state exists with a cusp at a characteristic temperature $$T_{f}$$ , which is also proved by the non-peak-shift with different frequency in the temperature dependence of the ac-susceptibility.
Starting Page	1
Ending Page	10
Page Count	10
File Format	PDF
ISSN	00222291
Journal	Journal of Low Temperature Physics
Volume Number	178
Issue Number	1-2
e-ISSN	15737357
Language	English
Publisher	Springer US
Publisher Date	2014-08-27
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Perovskite manganites Griffiths phase XPS Antiferromagnetic phase Valence state Magnetic phase transition Condensed Matter Physics Characterization and Evaluation of Materials Magnetism, Magnetic Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Materials Science

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