Cluster spin-glass behavior in Ni2In-type Mn–Cu-Ga alloys

Xu, Xiaofei; Zhao, Xinguo; Guo, Jie; Liu, Wei; Zhang, Zhidong

doi:10.1016/j.jallcom.2019.152678

Cited by 11 publications

(1 citation statement)

References 36 publications

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“…Here we uncovered a cluster spin-glass phase below the Curie temperature (T C ), by measuring the zero-field-cooling (ZFC) magnetization and ac susceptibility. It is noted that observation of spin-glass behavior in Mn 1.5 Cu 0.5 Ga sample was also reported very recently [17]. Moreover, in this work, due to the interface exchange interaction between the spin-glass clusters, a significant exchange bias (EB) effect and coercivity (H C ) is established in x = 0.5 sample.…”

Section: Introductionsupporting

confidence: 80%

Spin-glass mediated large exchange bias and coercivity in hexagonal Mn1+xCu1−xGa (x = 0.3–0.5) alloys

You

Tang

et al. 2020

J. Phys. D: Appl. Phys.

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Ni2In-type MnMX alloys possess interesting noncollinear magnetic structures that may embed a variety of physical phenomena. In this work, magnetic and electrical transport properties of pure Ni2In-type structure Mn1 +xCu1−xGa (x = 0.3–0.5) alloys are investigated systematically. A cluster spin-glass phase is identified below the Curie temperature by magnetization and ac susceptibility measurements in x = 0.5 sample. Mediated by the exchange interaction between Mn-Mn clusters, significant exchange bias effect and coercivity are established, in which a giant exchange bias field of up to 0.323 T is observed in x = 0.5 sample. The exchange bias effect and coercivity, as well as the anomalous Hall effect are found to be greatly tuned via field cooling process. The large EB and coercivity identified in Mn–Cu–Ga alloys make them potentially applied in rare-earth-free magnets and spintronic devices.

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Section: Introductionsupporting

confidence: 80%