Importance of site occupancy and absence of strain glassy phase in Ni2-xFexMn1.5In0.5

JOURNAL OF ALLOYS AND COMPOUNDS

卷:797

Article

Nevgi, R.¹  Das, Gangadhar²  Acet, M.³  Priolkar, K. R.¹ 

[1] Goa Univ, Dept Phys, Taleigao Plateau 403206, Goa, India

[2] Jawaharlal Nehru Ctr Adv Sci Res, Chem & Phys Mat Unit, Jakkur 560064, Bengaluru, India

[3] Univ Duisburg Essen, Expt Phys, D-47048 Duisburg, Germany

关键词: Strain glass;    Ni2-xFexMn1.5In0.5;    Ferromagnet;   

DOI  :  10.1016/j.jallcom.2019.05.172

来源: Elsevier

【 摘 要 】

Martensitic transition temperature steadily decreases in Ni2-xFexMn1.5In0.5 and is completely suppressed at x = 0.2. Despite suppression of martensitic transition, Ni1.8Fe0.2Mn1.5In0.5 does not display the expected strain glassy phase. Instead, a ground state with dominant ferromagnetic interactions is observed. A study of structural and magnetic properties of x = 0.2 reveal that the alloy consists of a major Fe rich cubic phase and a minor Fe deficient monoclinic phase favoring a ferromagnetic ground state. This is exactly opposite of that observed in Ni2Mn1-yFeyIn0.5 wherein a strain glassy phase is observed for y = 0.1. The change in site symmetry of Fe when doped for Ni in contrast to Mn in the Heusler composition seems to support the growth of the ferromagnetic phase. (C) 2019 Elsevier B.V. All rights reserved.

【 授权许可】

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