[21a-P02-1~50] 10 Spintronics and Magnetics(Poster)

▲ [21a-P02-12] Large magnetocapacitance beyond 420% in epitaxial magnetic tunnel junctions with an MgAl₂O₄ barrier

〇Kenta Sato¹, Hiroaki Sukegawa², Kentaro Ogata¹, Gang Xiao³, Hideo Kaiju^1,4 (1.Keio Univ., 2.NIMS, 3.Brown Univ., 4.CSRN, Keio Univ.)

Keywords:magnetocapacitance, MTJ

We investigate the frequency characteristics and voltage dependence of tunnel magnetocapacitance (TMC) in magnetic tunnel junctions (MTJs) with MgAl₂O₄ barriers. As a result, we have successfully observed a maximum TMC value of 426%, which is the largest TMC ever reported MTJs at room temperature. The frequency and voltage characteristics of TMC provide an excellent fit with extended Debye-Frölich model. Our results will open up a new pathway for fundamental spintronics and its application.