Magnetic and structural transition of Ni50+xMn25-x/2Ga25-x/2 (x=2-5) alloys

被引:17
作者
Feng, G [1 ]
Jiang, CB [1 ]
Liang, T [1 ]
Xu, HB [1 ]
机构
[1] Beijing Univ Aeronaut & Astronaut, Dept Mat Sci & Engn, Beijing 100083, Peoples R China
基金
中国国家自然科学基金;
关键词
NiMnGa; magnetic transition; phase transition; Ni substitution; magnetic shape memory alloy;
D O I
10.1016/S0304-8853(02)00346-3
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Magnetic and structural transitions of non-stoichiometric Ni50+xMn25-x/2Ga25-x/2 (x = 2-5) alloys are systematically investigated. Differential scanning calorimetry and modified thermogravimetry (TG) are used to measure magnetic and structural transitions simultaneously. The structural transition temperatures increase monotonically with increasing Ni substitution for Mn and Ga. Different magnetic transition sequences on heating were observed from ferromagnetic martensite to ferromagnetic autensite, then to paramagnetic autensite, from ferromagnetic martensite to paramagnetic austensite or from ferromagnetic martensite to paramagnetic martensite, respectively. Three kinds of NiMnGa alloys were obtained according to the sequence of the structural and magnetic transition, whose structural transition temperatures are lower, equal to or higher than the magnetic transition temperatures. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:312 / 317
页数:6
相关论文
共 13 条
[1]   Isomagnetic martensitic transformation in Ni2MnGa alloys [J].
Glavatska, NI ;
Ullakko, K .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2000, 218 (2-3) :256-260
[2]   Co-occurrence of magnetic and structural transitions in the Heusler alloy Ni53Mn25Ga22 [J].
Jiang, CB ;
Feng, G ;
Xu, HB .
APPLIED PHYSICS LETTERS, 2002, 80 (09) :1619-1621
[3]  
Martnar V., 1995, J PHYS IV, V5, pC8
[4]   Phase transformation of Heusler type Ni2+xMn1-xGa (x = 0 ∼ 0.19) [J].
Matsumoto, M ;
Takagi, T ;
Tani, J ;
Kanomata, T ;
Muramatsu, N ;
Vasil'ev, AN .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1999, 273 :326-328
[5]   6% magnetic-field-induced strain by twin-boundary motion in ferromagnetic Ni-Mn-Ga [J].
Murray, SJ ;
Marioni, M ;
Allen, SM ;
O'Handley, RC ;
Lograsso, TA .
APPLIED PHYSICS LETTERS, 2000, 77 (06) :886-888
[6]   Phenomenology of giant magnetic-field-induced strain in ferromagnetic shape-memory materials (invited) [J].
O'Handley, RC ;
Murray, SJ ;
Marioni, M ;
Nembach, H ;
Allen, SM .
JOURNAL OF APPLIED PHYSICS, 2000, 87 (09) :4712-4717
[7]   Chemical ordering in Ni-Mn-Ga Heusler alloys [J].
Overholser, RW ;
Wuttig, M ;
Neumann, DA .
SCRIPTA MATERIALIA, 1999, 40 (10) :1095-1102
[8]   Large magnetic-field-induced strains in Ni2MnGa single crystals [J].
Ullakko, K ;
Huang, JK ;
Kantner, C ;
OHandley, RC ;
Kokorin, VV .
APPLIED PHYSICS LETTERS, 1996, 69 (13) :1966-1968
[9]   Structural and magnetic phase transitions in shape-memory alloys Ni2+xMn1-xGa [J].
Vasil'ev, AN ;
Bozhko, AD ;
Khovailo, VV ;
Dikshtein, IE ;
Shavrov, VG ;
Buchelnikov, VD ;
Matsumoto, M ;
Suzuki, S ;
Takagi, T ;
Tani, J .
PHYSICAL REVIEW B, 1999, 59 (02) :1113-1120
[10]  
VASILEV A, 1997, J MAGN MAGN MATER, V196, P837