Structural and temperature dependence of physical properties of Ni2MnM (M=Al, Ga and In) Heusler alloys
Structural and temperature dependence of physical properties of Ni2MnM (M=Al, Ga and In) Heusler alloys
Nina Lee(Hanyang Univ.); 이영백(한양대학교); B. J. Kim(Hanyang Univ.); 이주열(호서대학교); M. D. Huang(Hanyang Univ.); Y. V. Kudryavtsev(Ukralna)
45권 1호, 34~37쪽
초록
Some physical properties of bulk Heusler alloys, Ni2MnM (M = Al, Ga and In), and their thin lms were studied. Structural characterization was performed by using X-ray di raction. The optical conductivity spectra of the bulk samples exhibit a two-peak structure in the 0.5 - 4.5 eV energy range. The evolution of the high-energy peak can be explained by the variation of the lattice constant. A SQUID magnetometer was employed to measure the temperature dependence of the magnetic properties in the 5 - 395 K temperature range. The disordered phase of the Ni2MnGa and Ni2MnIn alloy lms behaves like Pauli paramagnets. Annealing of the disordered lms restores the ordered structure, with almost full recovery of the magnetic and transport properties of the ordered lms.
Abstract
Some physical properties of bulk Heusler alloys, Ni2MnM (M = Al, Ga and In), and their thin lms were studied. Structural characterization was performed by using X-ray di raction. The optical conductivity spectra of the bulk samples exhibit a two-peak structure in the 0.5 - 4.5 eV energy range. The evolution of the high-energy peak can be explained by the variation of the lattice constant. A SQUID magnetometer was employed to measure the temperature dependence of the magnetic properties in the 5 - 395 K temperature range. The disordered phase of the Ni2MnGa and Ni2MnIn alloy lms behaves like Pauli paramagnets. Annealing of the disordered lms restores the ordered structure, with almost full recovery of the magnetic and transport properties of the ordered lms.
- 발행기관:
- 한국물리학회
- 분류:
- 물리학