Department of Physics, Loughborough University, LE11 3TU, UK. Institut Laue Langevin, BP 156, 38042 Grenoble, France.
J Phys Condens Matter. 2011 Nov 16;23(45):456004. doi: 10.1088/0953-8984/23/45/456004. Epub 2011 Oct 28.
Magnetization and high resolution neutron powder diffraction measurements have been made on the magnetic shape memory alloy Ni(1.84)Mn(1.64)In(0.52). The compound undergoes a broad structural phase transition, which on heating starts at ∼150 K and finishes at ∼215 K. On cooling there is a ∼20 K hysteresis. The high temperature parent phase is cubic (a = 5.988 Å) with the L2(1) structure in which the excess Mn atoms occupy the vacancies on the Ni and In sites. The magnetic moment is located mainly on the Mn atoms with the same magnitude on both the 4a (Mn) and 4b (In) sites. The low temperature martensite is monoclinic with parameters a = 4.405(2), b = 5.553(2), c = 12.950(2) Å, β = 86.47(10)° and space group P2/m. The magnetic properties of the martensitic phase are complex and indicate metamagnetic behaviour.
磁化和高分辨率中子粉末衍射测量已经在磁形状记忆合金 Ni(1.84)Mn(1.64)In(0.52)上进行。该化合物经历了一个宽的结构相变，在加热时从约 150 K 开始，在约 215 K 结束。在冷却时存在约 20 K 的滞后。高温母体相为立方相（a = 5.988 Å），具有 L2(1)结构，其中过量的 Mn 原子占据 Ni 和 In 位的空位。磁矩主要位于 Mn 原子上，在 4a（Mn）和 4b（In）位上具有相同的大小。低温马氏体为单斜晶系，参数为 a = 4.405(2)，b = 5.553(2)，c = 12.950(2) Å，β = 86.47(10)°，空间群为 P2/m。马氏体相的磁性质复杂，表明具有变磁行为。
