Magnetic properties of Ni50Mn34.8In15.2 probed by Mossbauer spectroscopy

作者：Khovaylo V V^*; Kanomata T; Tanaka T; Nakashima M; Amako Y; Kainuma R; Umetsu R Y; Morito H; Miki H

来源：Physical Review B, 2009, 80(14): 144409.

DOI：10.1103/PhysRevB.80.144409

Structural and magnetic properties of a Ni50Mn34.8In15.2 ferromagnetic shape memory alloy doped by Fe-57 at the Mn sites have been studied by x-ray diffraction, Mossbauer spectroscopy and superconducting quantum interference device magnetometry. Obtained experimental results have disclosed unique magnetostructural transition from a high-temperature ferromagnetic austenitic phase to a low-temperature paramagnetic martensitic phase at M-f = 290 K. Complex magnetic ordering which can be classified as a cluster glass state is formed in Ni50Mn34.3 (Fe0.5In15.2)-Fe-57 on further cooling below T-C(M) = 162 K. The abnormal magnetostructural transition observed in Ni50Mn34.3 (Fe0.5In15.2)-Fe-57 is suggested to originate from the weakening of exchange interactions due to an abrupt change in Mn-Mn interatomic distances occurring upon the martensitic transformation.

• 出版日期2009-10