Magnetocapacitance effect of spin tunneling junctions

H. Kaiju, S. Fujita, T. Morozumi, K. Shiiki

研究成果: Article査読

44 被引用数 (Scopus)

抄録

Magnetocapacitance effect of coercive differential spin tunneling junctions Co(100Å)/Al 2O 3(∼20Å)/Co(500Å) fabricated onto a glass substrate by ion-beam mask sputtering was investigated. The impedance was measured by a four-probe method at room temperature in the frequency range from 120 Hz to 1 MHz. It is found that the effective capacitance changes with the application of an external magnetic field. At high frequencies, the magnetocapacitance ratio is as large as the dc magnetoresistance ratio. However, at low frequencies, capacitance changes cannot be observed because the measurement sensitivity is too low. The magnetocapacitance effect was hence found to be a promising tool for high frequency magnetic sensing.

本文言語English
ページ(範囲)7430-7432
ページ数3
ジャーナルJournal of Applied Physics
91
10 I
DOI
出版ステータスPublished - 2002 5 15

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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