TY - JOUR
T1 - Suppression of martensitic transformation in Fe50Mn23Ga27 by local symmetry breaking
AU - Ma, Tianyu
AU - Liu, Xiaolian
AU - Yan, Mi
AU - Wu, Chen
AU - Ren, Shuai
AU - Li, Huiying
AU - Fang, Minxia
AU - Qiu, Zhiyong
AU - Ren, Xiaobing
N1 - Publisher Copyright:
© 2015 AIP Publishing LLC.
PY - 2015/5/25
Y1 - 2015/5/25
N2 - Defects-induced local symmetry breaking has led to unusual properties in nonferromagnetic ferroelastic materials upon suppressing their martensitic transformation. Thus, it is of interest to discover additional properties by local symmetry breaking in one important class of the ferroelastic materials, i.e., the ferromagnetic shape memory alloys. In this letter, it is found that local symmetry breaking including both tetragonal nano-inclusions and anti-phase boundaries (APBs), suppresses martensitic transformation of a body-centered-cubic Fe50Mn23Ga27 alloy, however, does not affect the magnetic ordering. Large electrical resistivity is retained to the low temperature ferromagnetic state, behaving like a half-metal ferromagnet. Lower ordering degree at APBs and local stress fields generated by the lattice expansion of tetragonal nanoparticles hinder the formation of long-range-ordered martensites. The half-metal-like conducting behavior upon suppressing martensitic transformation extends the regime of ferromagnetic shape memory materials and may lead to potential applications in spintronic devices.
AB - Defects-induced local symmetry breaking has led to unusual properties in nonferromagnetic ferroelastic materials upon suppressing their martensitic transformation. Thus, it is of interest to discover additional properties by local symmetry breaking in one important class of the ferroelastic materials, i.e., the ferromagnetic shape memory alloys. In this letter, it is found that local symmetry breaking including both tetragonal nano-inclusions and anti-phase boundaries (APBs), suppresses martensitic transformation of a body-centered-cubic Fe50Mn23Ga27 alloy, however, does not affect the magnetic ordering. Large electrical resistivity is retained to the low temperature ferromagnetic state, behaving like a half-metal ferromagnet. Lower ordering degree at APBs and local stress fields generated by the lattice expansion of tetragonal nanoparticles hinder the formation of long-range-ordered martensites. The half-metal-like conducting behavior upon suppressing martensitic transformation extends the regime of ferromagnetic shape memory materials and may lead to potential applications in spintronic devices.
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U2 - 10.1063/1.4921928
DO - 10.1063/1.4921928
M3 - Article
AN - SCOPUS:84930681365
VL - 106
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 21
M1 - 211903
ER -