Cr3+掺杂对h-LuMnO3晶格畸变和磁有序的影响

doi:10.11896/cldb.24070037

材料导报

2025, Vol. 39

Issue (19): 24070037-5 https://doi.org/10.11896/cldb.24070037

无机非金属及其复合材料

Cr³⁺掺杂对h-LuMnO₃晶格畸变和磁有序的影响

曹鹤芳^1,*, 张爱梅², 吕锦彬¹, 李强¹, 绳星星¹

1 新疆第二医学院生物医学工程学院,新疆克拉玛依 834000
2 河海大学力学与工程科学学院,南京 210000

Effect of Cr³⁺ Doping on Lattice Distortion and Magnetic Order of h-LuMnO₃

CAO Hefang^1,*, ZHANG Aimei², LYU Jinbin¹, LI Qiang¹, SHENG Xingxing¹

1 College of Biomedical Engineering, Xinjiang Second Medical College, Karamay 834000, Xinjiang, China
2 School of Mechanics and Engineering Science, Hohai University, Nanjing 210000, China

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摘要本工作采用固相法制备了LuMn_1-xCr_xO₃ (0≤x≤0.15)系列样品,研究了Cr³⁺对LuMn_1-xCr_xO₃晶格畸变和磁性能的影响。XPS结果表明,LuMnO₃中Cr元素是正三价的,Cr³⁺掺杂会诱导Mn³⁺向Mn⁴⁺转变,导致Mn³⁺/Mn⁴⁺比例降低。XRD结果表明,样品皆为六角相,Mn-O键长和键角的变化说明Mn³⁺的三聚作用减弱,MnO₅双锥的倾斜角减小。拉曼散射的结果与XRD结果可相互印证。磁化强度-温度曲线证明样品中存在弱铁磁性。同时LuMn_1-xCr_xO₃ (0≤x≤0.1)样品中反铁磁转变温度随Cr³⁺掺杂浓度的提高由91 K升高到106 K,说明Cr³⁺的掺杂增强了样品的反铁磁序。LuMn_1-xCr_xO₃样品中反铁磁耦合增强的原因是Mn³⁺三聚反应、铁磁双交换作用与反铁磁超交换作用三者之间竞争的结果,其中Mn³⁺-O^2--Mn³⁺、Mn⁴⁺-O^2--Mn⁴⁺、Cr³⁺-O^2--Cr³⁺反铁磁超交换作用占主导地位。

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	曹鹤芳
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	李强
	绳星星

关键词: LuMnO₃ 结构畸变 W-H-ISM模型反铁磁超交换作用磁有序

Abstract: In this work, a series of LuMn_1-xCr_xO₃ (0≤x≤0.15) samples were prepared by conventional solid-state reaction method, and the effect of Cr³⁺ on the lattice distortion and magnetic properties LuMnO₃ were investigated. The XPS results showed that the Cr element in LuMn_1-xCr_xO₃ was positive trivalent, and Cr³⁺ doping would induce the transformation of Mn³⁺ ions into Mn⁴⁺ ions, leading to a lower Mn³⁺ to Mn⁴⁺ ratio. The results of XRD showed that the samples were hexagonal structure. The changes of Mn-O bond lengths and Mn-O-Mn bond angles indicated that the tri-merization of Mn³⁺ ions was weakened and the tilting angle of MnO₅ bipyramids was decreased. The results of Raman scattering are mutually ve-rified with the XRD results. The temperature dependence on magnetization (M-T) curves proved that weak ferromagnetism exists in the samples. At the same time, the antiferromagnetic transition temperature of LuMn_1-xCr_xO₃ (0≤x≤0.1) samples was enhanced from 91 K to 106 K with the increase of Cr³⁺ doping concentration, indicating that the antiferromagnetic order was enhanced by the Cr³⁺ doping. The enhancement of antiferromagnetic coupling in LuMn_1-xCr_xO₃ samples was due to competition between Mn³⁺ ion trimerization, ferromagnetism double exchange and antiferromagnetic super exchange, in which the antiferromagnetic super exchange of Mn³⁺-O^2--Mn³⁺、Mn⁴⁺-O^2--Mn⁴⁺ and Cr³⁺-O^2--Cr³⁺ predominate.

Key words: LuMnO₃ structure distortion Williamson-Hall-isotropic strain model antiferromagnetic super exchange interaction magnetic order

出版日期: 2025-10-10 发布日期: 2025-09-24

ZTFLH:	O469
	O441

基金资助: 克拉玛依市创新环境建设计划(创新人才)项目(2024hjcxrc0107);新疆第二医学院青年科学基金(QK202201;QK202307)

通讯作者: *曹鹤芳,硕士,新疆第二医学院讲师。目前主要从事多铁材料等方面的研究工作。1109468232@qq.com

引用本文:

曹鹤芳, 张爱梅, 吕锦彬, 李强, 绳星星. Cr³⁺掺杂对h-LuMnO₃晶格畸变和磁有序的影响[J]. 材料导报, 2025, 39(19): 24070037-5.
CAO Hefang, ZHANG Aimei, LYU Jinbin, LI Qiang, SHENG Xingxing. Effect of Cr³⁺ Doping on Lattice Distortion and Magnetic Order of h-LuMnO₃. Materials Reports, 2025, 39(19): 24070037-5.

链接本文:

https://www.mater-rep.com/CN/10.11896/cldb.24070037 或 https://www.mater-rep.com/CN/Y2025/V39/I19/24070037

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