Evolution of Griffiths phase and spin reorientation in perovskite manganites

Xu Zheng; Tian Gao; Wei Jing; Xingyu Wang; Yongsheng Liu; Bin Chen; Hongliang Dong; Zhiqiang Chen; Shixun Cao; Chuanbing Cai; Vyacheslav V. Marchenkov

doi:10.1016/j.jmmm.2019.165611

Evolution of Griffiths phase and spin reorientation in perovskite manganites

Xu Zheng
, Tian Gao^*
, Wei Jing
, Xingyu Wang
, Yongsheng Liu
, Bin Chen
, Hongliang Dong
, Zhiqiang Chen
, Shixun Cao
, Chuanbing Cai
, Vyacheslav V. Marchenkov

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

Magnetic properties of polycrystalline La_1- _xCa_xMn_0.9Cu_0.1O₃ (0.02 ≤ x ≤ 0.4) have been investigated in detail. All samples show a clear ferromagnetic-paramagnetic transition. The Curie temperature T_C decreases with increasing Ca-dopant. Inverse susceptibility of all the samples deviates from Curie-Weiss law above T_C, indicating the presence of a short range ferromagnetic and/or antiferromagnetic ordering state in the paramagnetic background. For 0.02 ≤ x ≤ 0.2, the upward deviation is attributed to antiferromagnetic interactions, while the downward for x ≥ 0.3 samples is caused by a Griffiths-like behavior, which is suppressed by an applied field. A charge ordering transition associated with an antiferromagnetic phase is detected in x ≥ 0.3 samples, the melting of which results in a spin reorientation transition and a new FM phase. Finally, the phase diagrams of this manganite system have been established.

Original language	English
Article number	165611
Journal	Journal of Magnetism and Magnetic Materials
Volume	491
DOIs	https://doi.org/10.1016/j.jmmm.2019.165611
State	Published - 1 Dec 2019
Externally published	Yes

Keywords

Griffiths phase
Magnetic phase transitions
Manganites
Phase separation
Short range ferromagnetic order

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10.1016/j.jmmm.2019.165611

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@article{20b1cd3b379240fb81a06013c1ff419f,

title = "Evolution of Griffiths phase and spin reorientation in perovskite manganites",

abstract = "Magnetic properties of polycrystalline La1- xCaxMn0.9Cu0.1O3 (0.02 ≤ x ≤ 0.4) have been investigated in detail. All samples show a clear ferromagnetic-paramagnetic transition. The Curie temperature TC decreases with increasing Ca-dopant. Inverse susceptibility of all the samples deviates from Curie-Weiss law above TC, indicating the presence of a short range ferromagnetic and/or antiferromagnetic ordering state in the paramagnetic background. For 0.02 ≤ x ≤ 0.2, the upward deviation is attributed to antiferromagnetic interactions, while the downward for x ≥ 0.3 samples is caused by a Griffiths-like behavior, which is suppressed by an applied field. A charge ordering transition associated with an antiferromagnetic phase is detected in x ≥ 0.3 samples, the melting of which results in a spin reorientation transition and a new FM phase. Finally, the phase diagrams of this manganite system have been established.",

keywords = "Griffiths phase, Magnetic phase transitions, Manganites, Phase separation, Short range ferromagnetic order",

author = "Xu Zheng and Tian Gao and Wei Jing and Xingyu Wang and Yongsheng Liu and Bin Chen and Hongliang Dong and Zhiqiang Chen and Shixun Cao and Chuanbing Cai and Marchenkov, \{Vyacheslav V.\}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

month = dec,

day = "1",

doi = "10.1016/j.jmmm.2019.165611",

language = "英语",

volume = "491",

journal = "Journal of Magnetism and Magnetic Materials",

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TY - JOUR

T1 - Evolution of Griffiths phase and spin reorientation in perovskite manganites

AU - Zheng, Xu

AU - Gao, Tian

AU - Jing, Wei

AU - Wang, Xingyu

AU - Liu, Yongsheng

AU - Chen, Bin

AU - Dong, Hongliang

AU - Chen, Zhiqiang

AU - Cao, Shixun

AU - Cai, Chuanbing

AU - Marchenkov, Vyacheslav V.

PY - 2019/12/1

Y1 - 2019/12/1

N2 - Magnetic properties of polycrystalline La1- xCaxMn0.9Cu0.1O3 (0.02 ≤ x ≤ 0.4) have been investigated in detail. All samples show a clear ferromagnetic-paramagnetic transition. The Curie temperature TC decreases with increasing Ca-dopant. Inverse susceptibility of all the samples deviates from Curie-Weiss law above TC, indicating the presence of a short range ferromagnetic and/or antiferromagnetic ordering state in the paramagnetic background. For 0.02 ≤ x ≤ 0.2, the upward deviation is attributed to antiferromagnetic interactions, while the downward for x ≥ 0.3 samples is caused by a Griffiths-like behavior, which is suppressed by an applied field. A charge ordering transition associated with an antiferromagnetic phase is detected in x ≥ 0.3 samples, the melting of which results in a spin reorientation transition and a new FM phase. Finally, the phase diagrams of this manganite system have been established.

AB - Magnetic properties of polycrystalline La1- xCaxMn0.9Cu0.1O3 (0.02 ≤ x ≤ 0.4) have been investigated in detail. All samples show a clear ferromagnetic-paramagnetic transition. The Curie temperature TC decreases with increasing Ca-dopant. Inverse susceptibility of all the samples deviates from Curie-Weiss law above TC, indicating the presence of a short range ferromagnetic and/or antiferromagnetic ordering state in the paramagnetic background. For 0.02 ≤ x ≤ 0.2, the upward deviation is attributed to antiferromagnetic interactions, while the downward for x ≥ 0.3 samples is caused by a Griffiths-like behavior, which is suppressed by an applied field. A charge ordering transition associated with an antiferromagnetic phase is detected in x ≥ 0.3 samples, the melting of which results in a spin reorientation transition and a new FM phase. Finally, the phase diagrams of this manganite system have been established.

KW - Griffiths phase

KW - Magnetic phase transitions

KW - Manganites

KW - Phase separation

KW - Short range ferromagnetic order

UR - https://www.scopus.com/pages/publications/85069970724

U2 - 10.1016/j.jmmm.2019.165611

DO - 10.1016/j.jmmm.2019.165611

M3 - 文章

AN - SCOPUS:85069970724

SN - 0304-8853

VL - 491

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

M1 - 165611

ER -

Evolution of Griffiths phase and spin reorientation in perovskite manganites

Abstract

Keywords

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