Phase structure and magnetic properties of the annealed Mn-rich Ni-Mn-Ga ferromagnetic shape memory thin films

被引：11

作者：

Kumar, S. Vinodh ^{[1
]}

Singh, R. K. ^{[2
]}

Seenithurai, S. ^{[1
]}

Bysakh, S. ^{[3
]}

Raja, M. Manivel ^{[2
]}

Mahendran, M. ^{[1
]}

机构：

[1] Thiagarajar Coll Engn, Dept Phys, Smart Mat Lab, Madurai 625015, Tamil Nadu, India

[2] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India

[3] Cent Glass & Ceram Res Inst, Kolkata 700032, India

来源：

MATERIALS RESEARCH BULLETIN | 2015年 / 61卷

关键词：

Ferromagnetic shape memory alloy; Thin films; Magnetic properties; TEM; FIELD-INDUCED STRAINS; TRANSFORMATION; DEPENDENCE; BEHAVIOR;

D O I：

10.1016/j.materresbull.2014.10.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The phase structure and magnetic behavior of sputter deposited and annealed Ni-Mn-Ga thin films of varying thickness have been studied. The as-deposited films exhibited quasi-amorphous structure having paramagnetic nature at room temperature. After annealing at 873 K for 30 min ferromagnetic ordering is recovered and the quasi-amorphous structure has changed to nanocrystalline structure. At low film thickness (<300 nm), the annealed films exhibited a mixture of cubic austenite (L2(1)) and martensite phases while at thickness greater than 1000 nm ordered L1(2) phase was observed. The magnetic properties were found to strongly depend on the structure of the constituent phases in the films. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：95 / 100

页数：6

共 28 条

[1] Composition, structure and magnetic properties of sputter deposited Ni-Mn-Ga ferromagnetic shape memory thin films [J].

Annadurai, A. ;

Nandakumar, A. K. ;

Jayakumar, S. ;

Kannan, M. D. ;

Raja, M. Manivel ;

Bysak, S. ;

Gopalan, R. ;

Chandrasekaran, V. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2009, 321 (06) :630-634

[2]

Babita I., 2007, J APPL PHYS, V102

[3] Epitaxial Ni-Mn-Ga Films for Magnetic Shape Memory Alloy Microactuators [J].

Backen, Anja ;

Yeduru, Srinivasa Reddy ;

Diestel, Anett ;

Schultz, Ludwig ;

Kohl, Manfred ;

Faehler, Sebastian .

ADVANCED ENGINEERING MATERIALS, 2012, 14 (08) :696-709

[4] Microstructural, mechanical and magnetic properties of shape memory alloy Ni55Mn23Ga22 thin films deposited by radio-frequency magnetron sputtering [J].

Bernard, F. ;

Delobelle, P. ;

Rousselot, C. ;

Hirsinger, L. .

THIN SOLID FILMS, 2009, 518 (01) :399-412

[5] Compositional instability of β-phase in Ni-Mn-Ga alloys [J].

Chernenko, VA .

SCRIPTA MATERIALIA, 1999, 40 (05) :523-527

[6]

Cullity B.D., 1977, ELEMENTS XRAY DIFFRA, V2nd

[7] Passivity of polycrystalline NiMnGa alloys for magnetic shape memory applications [J].

Gebert, A. ;

Roth, S. ;

Oswald, S. ;

Schultz, L. .

CORROSION SCIENCE, 2009, 51 (05) :1163-1171

[8] Compositional trends and magnetic excitations in binary and ternary Fe-Pd-X magnetic shape memory alloys [J].

Gruner, Markus Ernst ;

Hamann, Sven ;

Brunken, Hayo ;

Ludwig, Alfred ;

Entel, Peter .

JOURNAL OF ALLOYS AND COMPOUNDS, 2013, 577 :S333-S337

[9] Giant magnetostriction in annealed Co1-xFex thin-films [J].

Hunter, Dwight ;

Osborn, Will ;

Wang, Ke ;

Kazantseva, Nataliya ;

Hattrick-Simpers, Jason ;

Suchoski, Richard ;

Takahashi, Ryota ;

Young, Marcus L. ;

Mehta, Apurva ;

Bendersky, Leonid A. ;

Lofland, Sam E. ;

Wuttig, Manfred ;

Takeuchi, Ichiro .

NATURE COMMUNICATIONS, 2011, 2

[10] Phase transformations in sputtered Ni-Mn-Ga magnetic shape memory alloy thin films [J].

Jetta, N. ;

Ozdemir, N. ;

Rios, S. ;

Bufford, D. ;

Karaman, I. ;

Zhang, X. .

THIN SOLID FILMS, 2012, 520 (09) :3433-3439

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