[21a-P02-1~50] 10 スピントロニクス・マグネティクス(ポスター)

▲ [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.)

キーワード：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.