Title :
Current induced magnetization switching in an antiperovskite nitride exchange-coupled bilayer
Author :
Kuroki, Y. ; Sakakibara, H. ; Ando, H. ; Kawai, S. ; Hajiri, T. ; Ueda, K. ; Asano, H.
Author_Institution :
Dept. of Crystalline Mater. Sci., Nagoya Univ., Nagoya, Japan
Abstract :
Recently, current-induced spin transfer torque is attracting interest because it affects not only a FM but also an AFM. Furthermore, the critical current for AFM switching is more than 10-2 times smaller than typical value for a FM. Therefore, FM/AFM bilayers containing half-metallic FMs are desirable for studying current-induced magnetization switching and spin torque in AFM materials. Up to now, we focused on antiperovskite nitride because there are many combinations of elements that form the antiperovskite nitride such a AFM materials and half-metallic FM. Antiperovskite FM nitride Co3FeN is predicted that it has high negative spin polarization. Antiperovskite AFM nitride Mn3GaN exhibits many interesting properties, such as piezomagnetic. For Mn3GaN/Co3FeN bilayer, we expect application to the new devices controlling magnetic moments of Mn3GaN by spin transfer torque. In this study, we investigated current-induced magnetization switching in Mn3GaN/Co3FeN epitaxial exchange-coupled bilayers by employing AMR effect . We shall discuss spin transfer torque in antiferromagnetic Mn3GaN.
Keywords :
antiferromagnetic materials; cobalt compounds; enhanced magnetoresistance; exchange interactions (electron); ferromagnetic materials; gallium compounds; interface magnetism; magnetic epitaxial layers; magnetic switching; magnetisation; manganese compounds; AMR effect; Mn3GaN-Co3FeN; anisotropic magnetoresistance; antiperovskite antiferromagnetic nitride; antiperovskite ferromagnetic nitride; antiperovskite nitride exchange-coupled bilayer; current induced magnetization switching; current-induced spin transfer torque; epitaxial exchange-coupled bilayers; ferromagnetic-antiferromagnetic bilayers; spin polarization; Current measurement; Frequency modulation; Hybrid fiber coaxial cables; Magnetic field measurement; Magnetization; Switches; Torque;
Conference_Titel :
Magnetics Conference (INTERMAG), 2015 IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7321-7
DOI :
10.1109/INTMAG.2015.7156580