Complex magnetic properties of the double perovskite Hg2MnTeO6 probed by thermodynamic measurements and neutron diffraction
學年 114
學期 1
出版（發表）日期 2025-09-24
作品名稱 Complex magnetic properties of the double perovskite Hg2MnTeO6 probed by thermodynamic measurements and neutron diffraction
作品名稱（其他語言）
著者 En-Pei Liu; Sagar Mal Kumawat; Chi-Cheng Lee; Tzu-Hao Liu; Angel M. Arévalo-López; Wei-Tin Chen; and Chien-Lung Huang
單位
出版者
著錄名稱、卷期、頁數 PHYSICAL REVIEW B 112, 104436
摘要 We studied the structural and magnetic properties of the double perovskite oxides containing mercury, 𝐴2⁢MnTeO6 (𝐴 = Hg, Hg0.8⁢Ca0.2, and Ca). Hg2⁢MnTeO6 and (Hg0.8⁢Ca0.2)2MnTeO6 crystallize in a rhombohedral phase with 𝑅⁢ ‾‾ 3 space group, while Ca2⁢MnTeO6 crystallizes in a monoclinic phase with 𝑃⁢21/𝑛 space group. The magnetic susceptibility, specific heat, and neutron diffraction measurements show that, upon cooling, the commensurate antiferromagnetic (AFM) order occurs at 10 K, 8 K, and 11 K for 𝐴 = Hg, Hg0.8⁢Ca0.2, and Ca systems, respectively. The first-principles calculations agree well with the experimental results, showing that the type-I AFM spin arrangement, i.e., magnetic moments aligned ferromagnetically within the planes and antiferromagnetically between adjacent planes, has the lowest total energy compared to other types of long-range order. For all three systems, the magnetic entropy associated with the AFM order amounts to less than 80% of the theoretical value for the high-spin state of Mn2+, indicating magnetic frustration across the series. Additionally, an incommensurate order at 5 K was identified by neutron diffraction for Hg2⁢MnTeO6, which can be described by helicoidal spin order. This observation makes Hg2⁢MnTeO6 one of the most complex magnetic systems among double perovskite oxides.
關鍵字
語言 zh_TW
ISSN 2469-9969
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 是
國別 USA
公開徵稿
出版型式 ,電子版
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