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Magnetic and martensitic transitions in Ni-Fe-Ga alloy

机译:Ni-Fe-Ga合金中的磁和马氏体转变

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摘要

The ferromagnetic shape memory alloy with nominal composition Ni_(54)Fe_(19)Ga_(27) is investigated by Ac susceptibility and resistivity measurements. The alloy shows long-range ferromagnetic order below 290 K. The anomaly due to the martensitic transition is observed in the susceptibility and resistivity data in the temperature range around 220 K, which is associated with clear thermal hysteresis. Minor hysteresis loop technique was used to investigate the phase coexistence across the martensitic transition, and our analysis indicate that both martensite and austenite phases mutually coexist in the region of hysteresis.
机译:通过交流磁化率和电阻率测量研究了标称成分为Ni_(54)Fe_(19)Ga_(27)的铁磁形状记忆合金。该合金在290 K以下显示出远距离铁磁序。在220 K左右的温度范围内,在磁化率和电阻率数据中观察到由于马氏体转变引起的异常,这与明显的热滞相关。小磁滞回线技术用于研究马氏体相变之间的相共存,并且我们的分析表明,马氏体相和奥氏体相在磁滞区中共存。

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