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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Exchange-bias reversal in Mn2-XNi1+xGa films with antisite disorder

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Author(s):
Schaefer, D. M. [1, 2] ; de Oliveira, A. J. A. [3] ; de Camargo, P. C. [3] ; Varalda, J. [1] ; Schreiner, W. H. [1] ; Mosca, D. H. [1]
Total Authors: 6
Affiliation:
[1] Univ Fed Parana, Dept Fis, BR-81531980 Curitiba, Parana - Brazil
[2] Univ Tecnol Fed Parana, Dept Fis, BR-85884000 Campus Medianeira, Parana - Brazil
[3] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: INTERMETALLICS; v. 91, p. 22-30, DEC 2017.
Web of Science Citations: 0
Abstract

We report on the exchange-bias reversal in Mn2-xNi1+x (x = 0, 0.2, 0.4, and 0.6) thin films grown by molecular beam epitaxy on GaAs substrates. Exchange bias reversal is observed in these intrinsically ferrimagnetic films together with a reduction in the total moment even under increasing of Ni content which usually increases the total moment. These magnetic features indicate that antisite disorder is responsible for engender changes in the exchange-bias and total moment. Density functional theory calculations were performed to determine the magnetic moment dependence with the volume of cubic austenite and tetragonal martensite structures. A simple phenomenological approach is used to extract an effective exchange coupling constant from exchange bias fields. (AU)

FAPESP's process: 09/54082-2 - Acquisition of a vibranting sample magnetometer coupled with a superconducting quantum interference device assensor (Squid-VSM) with cryogenic closed cycle
Grantee:Ernesto Chaves Pereira de Souza
Support type: Multi-user Equipment Program
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC