Magnetization switching of CoPd alloy film on piezoelectric substrate via inverse piezoelectric effect

Author

Lee, Jeong-Won ; Shin, Sung-Chul ; Kim, Sang-Koog

Author_Institution

Dept. of Phys., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea

Volume

39

Issue

5

fYear

2003

Firstpage

2782

Lastpage

2784

Abstract

The magnetization switching of Co_0.25Pd_0.75 alloy film on Pb(Zr_0.52Ti_0.48)O₃ substrate was studied by measuring the polar Kerr rotation hysteresis loops and their electric field dependencies. It was found that the direction of spontaneous magnetization in CoPd alloy film was easily controllable via the inverse piezoelectric effect of the lead zirconate titanate layer, judging from the change of the Kerr rotation hysteresis loops with respect to an applied voltage. Since the magnetization direction maintains its initial state even when the applied voltage is turned off, this system is applicable to a future nonvolatile memory device.

Keywords

Kerr magneto-optical effect; cobalt alloys; ferromagnetic materials; lead compounds; magnetic hysteresis; magnetic switching; magnetic thin films; magnetisation; metallic thin films; palladium alloys; piezoceramics; spontaneous magnetisation; Co_0.25Pd_0.75; CoPd alloy film; PZT; PbZrO3TiO3; electric field dependence; inverse piezoelectric effect; magnetization switching; piezoelectric substrate; polar Kerr rotation hysteresis loops; spontaneous magnetization; Cobalt alloys; Electric variables measurement; Hysteresis; Magnetic field measurement; Magnetic switching; Magnetization; Piezoelectric effect; Piezoelectric films; Substrates; Titanium alloys;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2003.815709

Filename

1233214