Anisotropy of the magnetoresistance in ferromagnetic shape memory alloy Ni52Mn16.4Fe8Ga23.6 single crystal

• Published in: Journal of magnetism and magnetic materials Vol. 319; no. 1-2; pp. 69 - 72
• Main Authors: LIU, Z. H, ZHU, Z. Y, YU, S. Y, LUO, H. Z, CHEN, J. L, WU, G. H
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Science 01.12.2007
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Electronic conduction in metals and alloys; Electronic transport in condensed matter; Exact sciences and technology; Galvanomagnetic and other magnetotransport effects; Magnetic properties and materials; Martensitic transformations; Materials science; Other ferromagnetic metals and alloys; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Physics; Studies of specific magnetic materials; Quaternary alloys; Nickel alloys; Magnetoresistance; Ferromagnetic shape memory alloy; Anisotropy; Single crystal; Crystal orientation; Martensitic transformations; Magnetic field effects; Iron alloys; Magnetically soft alloy; Gallium alloys; Preferred orientation; 75.47.-m; 81.30.Kf; 75.50.Cc; Monocrystals; Shape memory alloy; Anisotropy; Manganese alloys; Heusler alloys; Magnetoresistance; Transition element alloys
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2007.04.039

We have studied the magnetotransport properties of the quaternary Heusler alloy Ni52Mn16.4Fe8Ga23.6 single crystal. The magnetoresistance (MR) {=[R(H)-R(0)]/R(0)} behavior shows a clear anisotropy at martensite state and the origin is mainly attributed to the different preferred orientations of martensite variants in three different crystallographic directions. At austenite state, the MR ratio increases linearly with increasing magnetic field and no anisotropy has been observed.