Magnetic properties and large magnetic-field-induced strains in off-stoichiometric Ni-Mn-Al Heusler alloys
Magnetic properties and large magnetic-field-induced strains in off-stoichiometric Ni-Mn-Al Heusler alloys
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DOI：
10.1063/1.1323552
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发表时间：
2000-11-06
影响因子：
4
通讯作者：
Ishida, K
中科院分区：
文献类型：
--
作者：
Fujita, A;Fukamichi, K;Ishida, K
研究了具有L2（1）有序结构的非化学计量比Ni-Mn-Al Heusler合金的磁性能和磁致应变（MFIS）。Ni 53 Mn 25 Al 22合金在居里温度以下发生明显的马氏体相变。在多晶试样中，在马氏体开始温度M-s和结束温度M-f之间确认了由于MFIS引起的不可逆相对变化，并且在刚好高于M-f时观察到约-100ppm的最大相对长度变化Δ L/L\（7 T）。在另一方面，一个大的不可逆的相对长度变化约1000 ppm已被证明在7 T的磁场从多晶试样切割的单晶。还证实了应变对磁场的响应延迟。(C)2000年美国物理学会。【S0003-6951（00）01645-4】。
Magnetic properties and magnetic-field-induced strains (MFIS) have been investigated for off-stoichiometric Ni-Mn-Al Heusler alloys with an ordered L2(1) structure. A clear martensitic transformation in Ni53Mn25Al22 alloy was revealed below the Curie temperature. In the polycrystalline specimen, an irreversible relative change due to the MFIS was confirmed between the martensite start and finish temperatures M-s and M-f, and a maximum relative length change DeltaL/L\(7T) of about -100 ppm was observed at just above M-f. On the other hand, a large irreversible relative length change of about 1000 ppm has been demonstrated in the magnetic field of 7 T for a single crystal cut from the polycrystalline specimen. A delay of the response of strains against the magnetic field was also confirmed. (C) 2000 American Institute of Physics. [S0003-6951(00)01645-4].