Crystal and magnetic structure of polar oxide HoCrWO6
Crystal and magnetic structure of polar oxide HoCrWO6
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DOI：
10.1016/j.jmmm.2020.167219
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发表时间：
2020-07
影响因子：
2.7
通讯作者：
C. Dhital;D. Pham;T. Lawal;C. Bucholz;A. Poyraz;Qiang Zhang;R. Nepal;Rongying Jin;Ram Rai
中科院分区：
文献类型：
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作者：
C. Dhital;D. Pham;T. Lawal;C. Bucholz;A. Poyraz;Qiang Zhang;R. Nepal;Rongying Jin;Ram Rai
合成了极性磁性氧化物HoCrWO 6，并对其晶体结构、磁结构和热力学性质进行了研究。HoCrWO 6由于W 6+和Cr 3+的阳离子有序化而形成极性晶体结构（空间群Pna 21（#33））。在TN = 24.5 K沿着出现反铁磁转变，磁熵变（~5 J.Kg.− 1 K − 1 at 70 kOe）。中子衍射测量表明，在2K时，Cr和Ho亚晶格都是有序的，磁矩分别为2.32（5）μ B和8.7（4）μ B. Cr形成A型共线反铁磁（AFM）结构，磁矩沿着中轴，Ho亚晶格有序排列在非共面AFM中。与同结构DyFeWO 6和DyCrWO 6的比较表明，这类化合物的磁结构受过渡金属亚晶格中g电子的存在与否控制。
Polar magnetic oxide HoCrWO6is synthesized and its crystal structure, magnetic structure, and thermodynamic properties are investigated. HoCrWO6forms the polar crystal structure (space groupPna21(#33)) due to the cation ordering of W6+and Cr3+. There is an antiferromagnetic transition atTN= 24.5 K along with the magnetic entropy change (~5 J.Kg.−1K−1at 70 kOe). Neutron diffraction measurement indicates that both Cr and Ho sublattices are ordered with the moment of 2.32(5)μBand 8.7(4)μBat 2 K, respectively. While Cr forms A-type collinear antiferromagnetic (AFM) structure with magnetic moment along thebaxis, Ho sublattice orders in a non-coplanar AFM arrangement. A comparison with isostructural DyFeWO6and DyCrWO6indicates that the magnetic structure of this family of compounds is controlled by the presence or absence ofegelectrons in the transition metal sublattice.