Studi Teoritis Pembentukan Momen Magnetik pada Alloy half-Heusler Mn2Ge

Anugrah Azhar (Program Studi Fisika, Fakultas Sains dan Teknologi, Universitas Islam Negeri Syarif Hidayatullah Jakarta, Jalan Ir. H. Djuanda No.95, Cempaka Putih, Ciputat, Kota Tangerang Selatan, Banten 15412, Indonesia)
Muhammad Aziz Majidi (Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Indonesia, Jalan Margonda Raya, Pondok Cina, Beji, Kota Depok, Jawa Barat 16424, Indonesia)

Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.2

Heusler alloy is a subclass material that consists of transition metal compounds with fascinating magnetic properties due to their magnetic moment value  that is still studied by many researchers due to their magnetic moment value that can be predicted using a simple calculation called Slater-Pauling rule (SP rule)s. According to the SP rule, when the total number of the valance electron gives a value of 18 (for half-Heusler alloy), the magnetic momen of this material is predicted by the value of 0 μB. By using this simple calculation, one can make material that have zero magnetic moment value. On the other hand, those this materials generally hasve halfhalf-metallic behavior in which the spin orientation only occurs on the one direction of either in the majority or minority spin channel. Starting from those issues, we propose a theoretical study to investigate the magnetic moment formation of halfhalf-Heusler alloyalloy Mn2Ge. Our results show that Mn2Ge have magnetic moment of 0.03 μB and show the halfhalf-metallic feature of Mn2Ge.