Martensitic transformation of Ni(2)FeGa ferromagnetic shape-memory alloy studied via transmission electron microscopy and electron energy-loss spectroscopy

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	Martensitic transformation of Ni(2)FeGa ferromagnetic shape-memory alloy studied via transmission electron microscopy and electron energy-loss spectroscopy
	Zhang, HR ; Ma, C ; Tian, HF ; Wu, GH ; Li, JQ
刊名	PHYSICAL REVIEW B
	2008
卷号	77 期号:21
关键词	SHORT-RANGE-ORDER TRANSITION-METALS PHASE MICROSTRUCTURES DIFFRACTION SCATTERING OCCUPANCY SPECTRA NI2MNGA MODEL
ISSN号	1098-0121
通讯作者	Zhang, HR: Chinese Acad Sci, Beijing Natl Lab Condensed Mat Phys, Inst Phys, Beijing 100080, Peoples R China.
中文摘要	The structural properties of Ni(2)FeGa Heusler alloy synthesized by melt-spinning technique have been systematically studied by means of in situ heating and cooling transmission electron microscopy. It was found that the Ni(2)FeGa alloy was annealed into a well-defined L2(1) structure at around 980 K, and complex microstructural domains appeared along with lowering temperature. At room temperature (293 K), a rich variety of micromodulated domains were observed. The domain structures were aligned along the < 110 > or < 100 > directions resulting to complex tweed structures. Below martensitic transformation (MT) temperature (M(s),similar to 142 K), the cubic parent phase transformed into unmodulated martensitic variants and modulated martensitic variants. The variants were alternated along the < 100 > direction with various arrangements and steplike incommensurate boundaries. The modulated martensitic variants were composed of lamellar structures that have predominately a 5M modulation structure along the < 110 > directions. The electron energy-loss spectroscopy analysis of the low-loss region and the electron energy-loss near-edge fine structure revealed a visible change of the electronic structure along with MT, which can be well interpreted by means of intra-atomic or intraband charge redistribution due to spd orbital hybridization among the Ni-Fe-Ga atoms.
收录类别	SCI
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/41769]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Zhang, HR,Ma, C,Tian, HF,et al. Martensitic transformation of Ni(2)FeGa ferromagnetic shape-memory alloy studied via transmission electron microscopy and electron energy-loss spectroscopy[J]. PHYSICAL REVIEW B,2008,77(21).
APA	Zhang, HR,Ma, C,Tian, HF,Wu, GH,&Li, JQ.(2008).Martensitic transformation of Ni(2)FeGa ferromagnetic shape-memory alloy studied via transmission electron microscopy and electron energy-loss spectroscopy.PHYSICAL REVIEW B,77(21).
MLA	Zhang, HR,et al."Martensitic transformation of Ni(2)FeGa ferromagnetic shape-memory alloy studied via transmission electron microscopy and electron energy-loss spectroscopy".PHYSICAL REVIEW B 77.21(2008).