|Understanding the martensitic phase transition of Ni-2(Mn1-xFex)Ga magnetic shape-memory alloys from theoretical calculations|
|Li, Chun-Mei; Hu, Qing-Miao; Yang, Rui; Johansson, Borje; Vitos, Levente; firstname.lastname@example.org
|Source Publication||PHYSICAL REVIEW B
|Abstract||By using first principles in combination with atomistic spin dynamics calculational methods, we determine the temperature-dependent free energies of the L2(1)-and L1(0)-Ni-2(Mn1-xFex) Ga (0 <= x <= 1), including phonon vibrational and magnetic energies. The x-dependent martensitic phase transformation (MPT) temperature (T-M) and the Curie temperature (T-C) are well represented. It is found that, the abnormal nonmonotonic behavior of T-M similar to x mainly originates from the phonon vibrational free energy. The magnetic energy, which does not change the trend of T-M against x but decreases the driving force of the MPT, is indispensable as well to get reasonable T-M values. This insight provides a good understanding of the physical mechanisms driving the MPT of Ni-2(Mn1-xFex)Ga, and promotes the improvement of their magnetic shape memory properties.|
|description.department||[li, chun-mei] shenyang normal univ, coll phys sci & technol, shenyang 110034, peoples r china
; [li, chun-mei
; hu, qing-miao
; yang, rui] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china
; [johansson, borje
; vitos, levente] royal inst technol, dept mat sci & engn, appl mat phys, se-10044 stockholm, sweden
; [johansson, borje
; vitos, levente] uppsala univ, dept phys, condensed matter theory grp, se-75120 uppsala, sweden
; [johansson, borje] dalian univ technol, sch phys & optoelect technol, dalian 116024, peoples r china
; [johansson, borje] dalian univ technol, coll adv sci & technol, dalian 116024, peoples r china
; [vitos, levente] res inst solid state phys & opt, h-1525 budapest, hungary
|Funding Organization||NSFC [51171187, 51271181, 51301176]; MoST of China [2014CB644001]; China Postdoctoral Science Foundation; Institute of Metal Research (IMR), Chinese Academy of Sciences; Shenyang National laboratory for Material Science (SYNL)
Li, Chun-Mei,Hu, Qing-Miao,Yang, Rui,et al. Understanding the martensitic phase transition of Ni-2(Mn1-xFex)Ga magnetic shape-memory alloys from theoretical calculations[J]. PHYSICAL REVIEW B,2015,91(17):-.
Li, Chun-Mei,Hu, Qing-Miao,Yang, Rui,Johansson, Borje,Vitos, Levente,&email@example.com.(2015).Understanding the martensitic phase transition of Ni-2(Mn1-xFex)Ga magnetic shape-memory alloys from theoretical calculations.PHYSICAL REVIEW B,91(17),-.
Li, Chun-Mei,et al."Understanding the martensitic phase transition of Ni-2(Mn1-xFex)Ga magnetic shape-memory alloys from theoretical calculations".PHYSICAL REVIEW B 91.17(2015):-.
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