Physical properties of Ti<sub>2</sub>MnAl, Ti<sub>2</sub>FeAl and Ti<sub>2</sub>FeGa compounds.
Анотація
Heusler compounds can exhibit many interesting physical properties such as high thermopower, magnetocaloric properties or even topological insulator state [1]. One of the very exciting properties which were already seen experimentally in Heusler compound is the spin gapless semiconductor (SGS) state reported for Mn2CoAl [2]. In that type of material in one spin channel valence and conduction band just touches, and in the second spin channel there exist a band-gap. Such electronic structure is very sensitive to external influences like a magnetic field or pressure since no threshold energy is required to move electrons from occupied states to empty states.Посилання
C. Felser, A. Hirohata, Heusler Alloys, Properties, Growth, Applications, Springer Series in Materials Science, Springer International Publishing, Switzerland, 2016. ISBN 978-3-319-21448-1.
S. Ouardi, G.H. Fecher, C. Felser, J. Kübler, Phys. Rev. Lett. 110, (2013) 100401; S.Ouardi, G.H. Fecher, C. Felser, J. Kübler, Phys. Rev. Lett. 122 (2019) 059901(E).
X.L. Wang, Phys. Rev. Lett. 100 (2008) 156404.