Magnetism and T−x phase diagrams of Na and Ag substituted EuCd2As2
Date
2023-03-03
Authors
Kuthanazhi, Brinda
Joshi, Kamal R.
Ghimire, Sunil
Timmons, Eric
Wang, Lin-Lin
Gati, Elena
Xiang, Li
Prozorov, Ruslan
Bud'ko, Sergey
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Iowa State University Digital Repository, Ames IA (United States)
Abstract
EuCd2As2 is an antiferromagnetic semimetal that can host nontrivial topological properties, depending upon its magnetic state and excitations. Here, we report the synthesis and characterization of Eu(Cd1-xAgx)(2)As-2 and Eu1-yNayCd2As2, and we study the evolution and nature of magnetic order with doping. Temperature-substitution phase diagrams are constructed from the electrical resistance and magnetic susceptibility data. We observe a splitting of the magnetic transition into two different transitions, and the gradual increase in one of the transition temperatures with Ag and Na substitution. The other transition remains more or less independent of doping. We further show that a magnetic state with a net ferromagnetic moment is stabilized by both Ag and Na doping and this can be explained by considering the changes in band filling due to substitution as suggested by density functional theory (DFT) calculations. We thus show that chemical substitution and the subsequent changes in band filling could be a pathway to tune the magnetic ground state and to stabilize a ferromagnetic phase in EuCd2As2.
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IS-J 11025
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article
Comments
This article is published as Kuthanazhi, Brinda, Kamal R. Joshi, Sunil Ghimire, Erik Timmons, Lin-Lin Wang, Elena Gati, Li Xiang, Ruslan Prozorov, Sergey L. Bud'ko, and Paul C. Canfield. "Magnetism and T− x phase diagrams of Na-and Ag-substituted EuCd 2 As 2." Physical Review Materials 7, no. 3 (2023): 034402.
DOI: 10.1103/PhysRevMaterials.7.034402.
Copyright 2023 American Physical Society.
Posted with permission.
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