Tuning antiferromagnetic exchange interaction for spontaneous exchange bias in MnNiSnSi system

Abstract

Based on almost all the data from the literature on spontaneous exchange bias (SEB), it is expected that the system will show SEB if it meets two conditions simultaneously: (i) there are the coexistence and competition of antiferromagnetic (AFM) and ferromagnetic (FM) interactions and (ii) AFM interaction should dominate but not be too strong in this competition. In order to verify this view, a systematic study on SEB has been performed in this work. Mn50Ni40Sn10 with strong FM interaction and without SEB is chosen as the mother composition, and the negative chemical pressure is introduced by the substitution of Sn by Si to enhance AFM interaction. It is found that a long-range FM ordering window is closed, and a long-range AFM ordering window is opened. As a result, SEB is triggered and a continuous tuning of the spontaneous exchange bias field (HSEB) from 0 Oe to 1300 Oe has been realized in a Mn50Ni40Sn10−xSix system by the enhanced AFM interaction.

Interfacial spin glass mediated spontaneous exchange bias effect in self-assembled La0.7Sr0.3MnO3:NiO nanocomposite thin films

“…suggests that the pinning of moments is prominent at magnetically disordered interface 46,47 between LSMO and NiO rather than conventional ordered FM/AFM interface. In CEB, the interface magnetic disorder state is supressed during the FCC process causing the reduction in EB field value.…”

Zero-field cooling exchange bias induced by spin metastable state in MnNiGa system

“…随 后, 关于ZEB的研究, 涌现出很多出色的工作. 研究者 相继在Ni 2 Mn 1.4 Ga 0.6 [14] , Ni 50 Mn 36 Co 4 Sn 10 [15] , Ni 50 Mn 50−x -Sn x [16] , Ni 50 Mn 38 Ga 12−x Sb x [17] , Mn 50 Ni 40 Sn 10−x Si x [18] , Mn 50 -Ni 50−x Al x [19] , Ni 50 Mn 34 In 13 Fe 3 [20] 等Heusler合金体系, PdNCr 3 [21] , Mn 3 Co 1−x Mn x N [22,23] 等反钙钛矿氮化物体系, 以及La 1.5 Sr 0.5 CoMnO 6 [24] , Pr 1-x Ca x MnO 3 [25] , YMnO 3 [26] , Y 0.9 Pr 0.1 CrO 3 [27] , Co 0.8 Cu 0.2 Cr 2 O 4 [28] , La 2−x A x CoMnO 6−δ (A = Ba, Ca, Sr; x = 0, 0.5) [29] 等钙钛矿、尖晶石氧化 物体系中观测到ZEB. 最近, Zhang等人 [30] 在La 0.7 Sr 0.3 - [31] .…”

Spontaneous Zero-Field Cooling Exchange Bias in Ni–Co–Mn–Sn Metamagnetic Heusler Sputtered Film

“…Contrarily, in ZFC-EB phenomena no applied field is necessary during the cooling process for the occurrence of EB. According to the existing models, ZFC-EB, in off-stoichiometric Heusler alloys, is correlated to short range magnetic interactions [ 35 , 38 , 39 ], e.g., super ferromagnetism or super spin glass state. In the present study, we investigate FC and ZFC exchange bias in an epitaxial Ni–Co–Mn–Sn sputtered film and we probe, for first time, the evolution of a superferromagnetic-like state using AC susceptibility measurements at different DC bias fields.…”