Synthesis and magnetic properties in quaternary Ca1−xPrxCo2As2 single crystals. (29th October 2020)

• Record Type: Journal Article
• Authors: Zhang, Wei; Zong, Bingbing; Cao, Yating; Sun, Peng; Zhang, Ziyi; Qiu, Xianggang; Zhao, Run; Liu, Huayi; Fu, Yueju; Zhang, Kai; Li, Yubao
• Is Part Of: Journal of physics. Volume 33:Number 4(2021)
• Publication Date: 2020-10-29
• Subjects: AT2X2 structure -- antiferromagnetic -- ferromagnetic -- 3d–4f coupling; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/abc201
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: Series of Ca1− x Pr x Co2 As2 ( x = 0, 0.10, 0.25, 0.4, 0.6, 0.75, 0.85, 1) single crystals have been synthesized in order to clarify the variation of magnetic order from antiferromagnetic (AFM) in CaCo2 As2 to ferromagnetic (FM) in PrCo2 As2 . It is found that the lattice constant of c -axis are contracted with the introduction of Pr into Ca sites in CaCo2 As2 . Electronic transport measurements reveal the metallicity in this system. Systematic magnetic measurements and analysis show that substituting only 10% of Pr for Ca changes the magnetic ground state from A-type AFM ordering of Co magnetic moment in CaCo2 As2 to FM ordering in Ca1− x Pr x Co2 As2 (0.1 ⩽ x ⩽ 1). Most importantly, the abrupt drop of low temperature magnetic susceptibility below T FiM with x ⩾ 0.25 and the observed magnetic pole reversal with x ⩾ 0.4 suggests an AFM coupling between Co 3 d and Pr 4 f magnetic sublattice. Finally, a detailed magnetic phase diagram in this system has been obtained.