Tuning the Ground State and Its Relationship to Zero-Field-Cooled Exchange Bias in NiMnSnAl Alloys

Lu, N. L.; Li, Y.; Wang, H. B.; Han, Zhuo; Zhang, C. L.; Fang, Yong; Zhang, L.; Qian, Bin; Jiang, Xuefan

doi:10.1007/s10948-019-5069-5

Cited by 4 publications

(1 citation statement)

References 37 publications

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“…[17] Generally, the FM and AFM interactions of magnetic ground state result from the Mn-Mn exchange interaction within the regular Mn sublattice and the Mn-Mn exchange interaction between the regular Mn sublattice and Z sublattice, respectively. Thus, the variation of Ni-Mn-Z composition can generate complicated magnetic ground states, such as FM/AFM, [16,[18][19][20][21][22][23][24] FM/spin glass (SG), [25,26] super spin glass/AFM, [27][28][29] cluster SG (CSG)/AFM, [30] canonical spin glass/AFM, [31,32] SG/AFM, [33] FM/super ferromagnetic, [34] dilute spin glass (DSG)/AFM, [13] and reentrant spin glass/AFM, [14,15] as summarized in Table S1 (Supporting Information). The complexity in magnetic ground state makes the comparison of EB behaviours difficult.…”

Section: Introductionmentioning

confidence: 99%

Large Exchange Bias Triggered by Transition Zone of Spin Glass

Liao

Wei

Wang

et al. 2022

Advanced Physics Research

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Exchange bias has increasingly practical significance in magnetoresistive and spintronic devices. However, the underlying mechanism of exchange bias in bulk compounds with the structural single‐phase and inhomogeneous magnetic phases is still elusive. Herein, based on experimental and simulation results, two important parameters are studied, i.e., the antiferromagnetic (AFM) volume fraction and the ferromagnetic (FM)/AFM interface area, which essentially determine the (spontaneous) exchange bias of Mn‐rich Ni44Co6Mn44‐xSn6+x (x = 0 ∼ 6) magnetic shape memory alloys. The substitution Sn for Mn changes magnetic ground state following the sequence of superparamagnetic/AFM → dilute spin glass/AFM → transition zone → cluster spin glass/AFM → FM, accompanying the growth of FM cluster and the weakening of AFM interactions. The results reveal that the magnetic ground state for exchange bias is optimized at transition zone between dilute spin glass/strong AFM and cluster spin glass/weak AFM, in which the optimal AFM volume fraction and FM/AFM interface area are achieved by tuning magnetic fields. A giant exchange bias field of 702.7 mT and a spontaneous exchange bias field of 318.7 mT are demonstrated. The work contributes to in‐depth understanding of (spontaneous) exchange bias in magnetically inhomogeneous compounds.

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