[18p-E216-11~17] 10.1 Emerging materials in spintronics and magnetics (including fabrication and charactrization methodologies)

▲ [18p-E216-13] Magnetic damping of NiMnSb half-Heusler alloy film with varying annealing temperature

〇(PC)RUMA Mandal MANDAL¹, Zhenchao Wen¹, Takahide Kubota^2,3, Koki Takanashi^2,3, Yukiko. K. Takahashi¹ (1.NIMS, 2.IMR, Tohoku Univ., 3.CSRN, Tohoku Univ.)

Keywords:half-Heusler alloy, Structural Ordering, Magnetic Damping

Half-metallic Heusler alloys are primitive candidates for application in spintronic devices, such as magnetoresistive random access memory, current-perpendicular-to-plane giant magnetoresistance read heads for hard disk drives for their high spin polarization value and large magnetoresistance ratio. Compared to full Heusler alloys, half-Heusler alloys, owing to a large bandgap which helps to suppress thermal activation of electrons over the bandgap, could be advantageous for high-performance magnetoresistive devices. Epitaxially grown NiMnSb is a well-known candidate with all-potential properties for such applications. To further investigate the possibilities of this material for application in spintronic devices, the estimation of Gilbert damping is necessary. So, here we report the estimation of Gilbert damping as a function of annealing temperature (T_annl) and structural ordering.