Open AccessThe contribution of Fe atom to the magnetic moment of quaternary Heusler alloy N iMnFeGa
Author(s) -
Zhengnan Qian,
Sui Yu,
Yuqiang Liu,
Zhuhong Liu,
Guodong Liu,
Ming Zhang,
Yuting Cui,
Jinglan Chen,
Guangheng Wu
Publication year - 2003
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.52.2304
Subject(s) - materials science , diffusionless transformation , magnetic moment , condensed matter physics , magnetic shape memory alloy , curie temperature , dopant , magnetization , alloy , atom (system on chip) , arc melting , doping , martensite , crystallography , ferromagnetism , metallurgy , magnetic domain , magnetic field , microstructure , chemistry , physics , optoelectronics , quantum mechanics , computer science , embedded system
We have synthesized the pseudo-quaternary Heusler alloy Ni50Mn25 -xFe xGa25(x=0—25) by arc-melting and melt-spinning techniques .The structure ,magnetic properties,and martensitic phase transformation were investigated.The thermoelastic martensitic transformation characteristics and x-ray diffraction c onfirmed the high chemical ordering L21 structure of our samples in t he whole doping range.The dopant of iron decreases the martensitic transformation tempera ture and increases the Curie temperature for the doping level of x17.The ferro magnetic contribution of Fe atoms in Ni50.5Mn25-xFexGa24.5 h as been investigated in detail by precisely measuring the magnetization at 4K.It has been found that Fe atoms were indeed in Mn positions and contributed a loca lized moment up to 2.55—3.55μB.