An Interpretation of Martensitic Transformation in L12-Type Fe3Pt from Its Electronic Structure
An Interpretation of Martensitic Transformation in L12-Type Fe3Pt from Its Electronic Structure
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从电子结构解释L12型Fe3Pt的马氏体相变
DOI：
10.2320/matertrans.m2009400
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发表时间：
2010
影响因子：
1.2
通讯作者：
H. Akai
中科院分区：
文献类型：
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作者：
Takuya Yamamoto;Masataka Yamamoto;T. Fukuda;T. Kakeshita;H. Akai
部分有序Fe3Pt是铁磁形状记忆合金中的一种，其马氏体相由L12型结构向FCT马氏体(L60型结构)的二级类马氏体相转变形成，表现出较大的磁场感应应变。我们从本研究中计算的它们的电子结构出发，研究了这种转变的起源。电子结构中的一个特征是在费米能量以下的少数自旋带的态密度存在一个相对较高的峰值。这两个峰由于四方形变而分裂成两个峰，其中一个峰因形变而向较低的能量方向移动，这表明谱带的Jahn-Teller效应是引起这一转变的主要原因。
Partly ordered Fe 3 Pt is one of ferromagnetic shape memory alloys exhibiting a large magnetic field-induced strain in its martensite phase formed by a second-order-like martensitic transformation from the L1 2 -type structure to the so-called FCT martensite (L6 0 -type structure). We have investigated the origin of this transformation from their electronic structures calculated in the present study. A characteristic feature in the electronic structure is the existence of a relatively high peak in the density of states of the minority spin band just below the Fermi energy. This peak splits into two peaks by tetragonal distortion, and one of them shifts to lower energy by the distortion, suggesting that the band Jahn-Teller effect is the main cause for the transformation.
影响因子：
3.2
作者：
Tatsuaki Sakamoto;T. Fukuda;T. Kakeshita;T. Takeuchi;K. Kishio
通讯作者：
Tatsuaki Sakamoto;T. Fukuda;T. Kakeshita;T. Takeuchi;K. Kishio
由于有序 Fe3Pt 中变体的重排而产生的巨大磁场感应应变
DOI：
--
发表时间：
2004
期刊：
Science and Technology of Advanced Materials 5
影响因子：
--
作者：
安達泰治;児山欣典;北條正樹;富田佳宏;E. Tanaka;T.Sakamoto
通讯作者：
T.Sakamoto