The influence of chemical disorder enhancement on the martensitic transformation of the Ni50Mn36Sn14 Heusler-type alloy

被引：32

作者：

Passamani, E. C. ^{[1
]}

Nascimento, V. P. ^{[1
]}

Larica, C. ^{[1
]}

Takeuchi, A. Y. ^{[1
]}

Alves, A. L. ^{[2
]}

Proveti, J. R. ^{[2
]}

Pereira, M. C. ^{[3
]}

Fabris, J. D. ^{[4
]}

机构：

[1] Univ Fed Espirito Santo, Dept Fis, BR-29075910 Vitoria, ES, Brazil

[2] Univ Fed Espirito Santo, Dept Ciencias Matemate & Nat, BR-29932540 Sao Mateus, ES, Brazil

[3] Univ Fed Vales Jequitinhonha & Mucuri UFVJM, Inst Ciencia & Tecnol, BR-39803371 Teofilo Otoni, MG, Brazil

[4] Univ Fed Vales Jequitinhonha & Mucuri, Dept Quim, BR-39100000 Diamantina, MG, Brazil

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 30期

关键词：

Mossbauer spectroscopy; Magnetic properties; Martensitic transformation; Heusler alloys; STRUCTURAL-PROPERTIES; NI2MNSN;

D O I：

10.1016/j.jallcom.2011.05.018

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of chemical disorder over the martensitic phase transformation of the Ni50Mn36Sn14 Heusler-type alloy was systematically investigated by performing X-ray diffractometry (DRX), DC magnetization and Fe-57-doping and Sn-119-Mossbauer spectroscopy measurements. DRX patterns are characteristics of a L2(1)-type chemically disordered structure, where the presence of this disorder was first evaluated by analyzing the relative intensity of the (1 1 1) DRX reflection, which varies in the case of Fe-doped and practically disappears for the milled samples. In consequence, the magnetic properties of Fe-doped well-milled samples related to the martensitic phase transformation change substantially. 300 K Fe-57-Mossbauer spectroscopy data suggest that the changes in the magnetic properties related to the martensitic transformation are intrinsically correlated to the ferromagnetic and paramagnetic fractions, which are respectively associated with Fe atoms replacing Mn- and Sn-sites. In the case of milled samples, the drastic reduction of alloy magnetization was explained by the increase of the number of Mn atoms in the shell regions, which have a reduced magnetic moment comparatively to those in the grain cores. The magnetization change and the temperature transition in the martensitic transformation are governed by the grain core. The initial magnetic properties and martensitic transformation can be recovered by a subsequent annealing on the milled sample. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：7826 / 7832

页数：7

共 27 条

[1] Magnetic correlations in martensitic Ni-Mn-based Heusler shape-memory alloys: Neutron polarization analysis [J].

Aksoy, S. ;

Acet, M. ;

Deen, P. P. ;

Manosa, L. ;

Planes, A. .

PHYSICAL REVIEW B, 2009, 79 (21)

[2] Magnetization easy axis in martensitic Heusler alloys estimated by strain measurements under magnetic field [J].

Aksoy, Seda ;

Krenke, Thorsten ;

Acet, Mehmet ;

Wassermann, Eberhard F. ;

Moya, Xavier ;

Manosa, Lluis ;

Planes, Antoni .

APPLIED PHYSICS LETTERS, 2007, 91 (25)

[3] Influence of grain refinement and induced crystal defects on the magnetic properties of Ni50Mn36Sn14 Heusler alloy [J].

Alves, A. L. ;

Passamani, E. C. ;

Nascimento, V. P. ;

Takeuchi, A. Y. ;

Larica, C. .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2010, 43 (34)

[4] Structural properties of magnetic Heusler alloys [J].

Ayuela, A ;

Enkovaara, J ;

Ullakko, K ;

Nieminen, RM .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1999, 11 (08) :2017-2026

[5] The magnetic and structural properties of the magnetic shape memory compound Ni2Mn1.44Sn0.56 [J].

Brown, PJ ;

Gandy, AP ;

Ishida, K ;

Kainuma, R ;

Kanomata, T ;

Neumann, KU ;

Oikawa, K ;

Ouladdiaf, B ;

Ziebeck, KRA .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2006, 18 (07) :2249-2259

[6]

Caer L., 2002, J METAST NANOCRYST M, V15, P239

[7] Reentrant-spin-glass state in Ni2Mn1.36Sn0.64 shape-memory alloy [J].

Chatterjee, S. ;

Giri, S. ;

De, S. K. ;

Majumdar, S. .

PHYSICAL REVIEW B, 2009, 79 (09)

[8] Structural-induced antiferromagnetism in Mn-based full Heusler alloys: The case of Ni2MnAl [J].

Galanakis, I. ;

Sasioglu, E. .

APPLIED PHYSICS LETTERS, 2011, 98 (10)

[9] Magnetic phase transition in half-metallic CoMnSb and NiMnSb semi-Heusler alloys upon Cu doping:: First-principles calculations [J].

Galanakis, I. ;

Sasioglu, E. ;

Oezdogan, K. .

PHYSICAL REVIEW B, 2008, 77 (21)

[10] CRYSTALLOGRAPHIC AND MAGNETIC-STRUCTURE OF NI2MNSN AND NIMN2SN [J].

HELMHOLDT, RB ;

BUSCHOW, KHJ .

JOURNAL OF THE LESS-COMMON METALS, 1987, 128 :167-171

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