Open AccessExtraction of the tunnel magnetocapacitance with two-terminal measurements
Author(s) -
Yin-Ming Chang,
KaiShin Li,
Hongbo Huang,
Mean-Jue Tung,
Shi-Yuan Tong,
MinnTsong Lin
Publication year - 2010
Publication title -
journal of applied physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.699
H-Index - 319
eISSN - 1089-7550
pISSN - 0021-8979
DOI - 10.1063/1.3407509
Subject(s) - magnetocapacitance , spintronics , tunnel magnetoresistance , giant magnetoresistance , magnetoresistance , tunnel junction , condensed matter physics , magnetic field , electrical impedance , terminal (telecommunication) , materials science , nuclear magnetic resonance , electrical engineering , ferromagnetism , physics , engineering , optoelectronics , quantum tunnelling , dielectric , multiferroics , telecommunications , quantum mechanics , ferroelectricity
The tunnel magnetocapacitance (TMC) of the magnetic tunnel junction has been investigated with a series of complex impedance spectra measured at varying magnetic field. To avoid the circuit complication in the four-terminal measurement with high frequency operation, two-terminal approach was developed by elimination of spin independent contribution apart from the junction area. A subsequent fitting process based on the difference spectra analysis gave the TMC ratio of -0.43% with the opposite dependence on the field as compared to the tunnel magnetoresistance (TMR) of 30.67%. This technique would be applied in the further development and integration of spintronics devices. © 2010 American Institute of Physics.
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