Unveiling the structural phase transition and magnetic structure of ternary boride PrIr3B2

被引:0
作者
Sharma, Shivani [1 ]
Ritter, C. [2 ]
Adroja, D. T. [3 ,4 ]
Stenning, Gavin B. G. [3 ]
机构
[1] Brookhaven Natl Lab, Natl Synchrotron Light Source 2, Upton, NY 11973 USA
[2] Inst Laue Langevin, 71 Ave Martyrs,CS 20156, F-38042 Grenoble, France
[3] Rutherford Appleton Lab, ISIS Facil, Chilton OX11 0QX, Oxon, England
[4] Univ Johannesburg, Phys Dept, Highly Correlated Matter Res Grp, ZA-2006 Auckland Pk, South Africa
基金
英国工程与自然科学研究理事会;
关键词
magnetic structure; neutron diffraction; structural transition; magnetic properties; CRYSTAL-STRUCTURE; SUSCEPTIBILITY;
D O I
10.1088/1361-648X/ad0af9
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We present a comprehensive study of PrIr3B2, which includes a detailed investigation of its crystal and magnetic structure using neutron diffraction. AC and DC magnetization and heat capacity data reveal antiferromagnetic ordering at T-N = 10 K. The heat capacity measurements further exhibit a broad peak near 270 K which is related to a structural transition from P6/mmm to C2/m seen in low temperature x-ray diffraction and neutron diffraction. High intensity neutron diffraction data confirm the long-range ordering of Pr3+ spins, with no apparent magnetic moment on either of the Iridium sites. Two possible magnetic structures with either k(1) = [1,0,0] or k(2) = [1/2,1/2 ,0] fit nearly equally well the neutron diffraction data. However, based on previous magnetization studies on a single crystalline sample it is argued that the second solution with k(2) corresponds to the appropriate magnetic structure of PrIr3B2 below 10 K. In this magnetic structure, the Pr3+ moments are oriented at similar to 45 degrees to both the a and b axes, with the c-axis being the hard axis of magnetization. Overall, our results provide new insights into the magnetic and structural properties of PrIr3B2.
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页数:7
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