Magnetic ground state and giant spontaneous exchange bias in Ni 46 Mn 43 In 11 alloy

Ray, Mayukh K.; Maji, Bibekananda; Modak, M.; Banerjee, S.

doi:10.1016/j.jmmm.2017.01.027

Cited by 17 publications

(7 citation statements)

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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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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“…Unlike the Ni-Mn-Ga family Ni-Mn-Z (Z = In, Sn, Sb) alloy undergo martensite transformation only in nonstoichiometric compounds at certain ratios between Mn and Z [19][20][21][22][23]. As a result, occurrence of any functional properties is directly associated with the composition.…”

Section: Introductionmentioning

confidence: 99%

First-principle studies of the tendency towards segregation in Heusler alloys Ni-=SUB=-2-=/SUB=-Mn-=SUB=-1+x-=/SUB=-Sb-=SUB=-1-x-=/SUB=- with different atomic ordering

Sokolovskiy

Buchelnikov

2022

Physics of the Solid State

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Using ab initio calculations, the stability issues of a series of Heusler alloys Ni2Mn1+xSb1-x (x=0, 0.25, 0.5, 0.75, 1) with staggered and layer-by-layer ordering of Mn atoms are investigated. It is shown that compositions with an excess of Mn are stable with respect to decomposition into constituent elements and unstable with respect to decomposition into a two-phase system consisting of a ferromagnetic cubic L21-phase Ni2MnSb and an antiferromagnetic tetragonal L10-phase NiMn. Thus, all nonstoichiometric compositions in the austenite and martensitic phases, taking into account different magnetic and atomic ordering, tend to segregate. Stability of alloys is possible only in stoichiometric compositions (x=0 and 1). Keywords: Heusler alloys, ab initio calculations, segregation, phase stability.

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“…В отличие от семейства Ni-Mn-Ga сплавы Ni-Mn-Z (Z = In, Sn, Sb) претерпевают мартенситное превращение лишь в нестехиометрических составах при определенных соотношениях между Mn и Z [19][20][21][22][23]. Как следствие, проявление тех или иных функциональных свойств напрямую связано с композиционным составом.…”

Section: Introductionunclassified

Первопринципные исследования тенденции к сегрегации в сплавах Гейслера Ni-=SUB=-2-=/SUB=-Mn-=SUB=-1+x-=/SUB=-Sb-=SUB=-1-x-=/SUB=- с различным атомным упорядочением

R.¹,

Соколовский²,

Buchelnikov³

2021

Физика Твердого Тела

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С помощью расчетов из первых принципов исследованы вопросы стабильности серии сплавов Гейслера Ni2Mn1+xSb1-x (x=0, 0.25, 0.5, 0.75, 1) с шахматным и послойным упорядочением атомов Mn. Показано, что композиции с избытком Mn являются устойчивыми по отношению к распаду на составляющие элементы и неустойчивыми по отношению к распаду на двухфазную систему, состоящую из ферромагнитной кубической L21-фазы Ni2MnSb и антиферромагнитной тетрагональной L10-фазы NiMn. Таким образом, все нестехиометрические составы в аустенитной и мартенситной фазе с учетом различного магнитного и атомного упорядочения проявляют тенденцию к сегрегации. Стабильность сплавов возможна только в стехиометрических составах (x = 0 и 1). Ключевые слова: Сплавы Гейслера, первопринципные вычисления, сегрегация, фазовая стабильность.

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Magnetic ground state and giant spontaneous exchange bias in Ni 46 Mn 43 In 11 alloy

Cited by 17 publications

References 37 publications

Large Exchange Bias Triggered by Transition Zone of Spin Glass

Large Exchange Bias Triggered by Transition Zone of Spin Glass

First-principle studies of the tendency towards segregation in Heusler alloys Ni-=SUB=-2-=/SUB=-Mn-=SUB=-1+x-=/SUB=-Sb-=SUB=-1-x-=/SUB=- with different atomic ordering

Первопринципные исследования тенденции к сегрегации в сплавах Гейслера Ni-=SUB=-2-=/SUB=-Mn-=SUB=-1+x-=/SUB=-Sb-=SUB=-1-x-=/SUB=- с различным атомным упорядочением

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