Title :
Fabrications of cerium-substituted YIG thin films for magnetic field sensor by pulsed-laser deposition
Author :
Higuchi, Sadao ; Ueda, Kiyotaka ; Yahiro, Fumiaki ; Nakata, Yoshiki ; Uetsuhara, Hiroshi ; Okada, Tatsuo ; Maeda, Mitsuo
Author_Institution :
Central Res. Inst. of Electr. Power Ind., Tokyo, Japan
fDate :
7/1/2001 12:00:00 AM
Abstract :
We described the pulsed-laser deposition (PLD) and characterization of cerium doped yttrium iron garnet (Ce:YIG, Ce0.6 Y2.4Fe5O12) thin films for magnetic field sensor applications. It was found that crystallized Ce:YIG films were obtained by the deposition at 900°C substrate temperature and in 10 mtorr argon or oxygen ambient gas. The Faraday rotation angle was very large; 4.2 deg/μm at 430 nm wavelengths. The charge state control of cerium was important for the crystallinity and high Faraday rotation. The lower temperature or higher ambient gas pressure controlled the cerium charge state Ce4+, because the oxygen and cerium released from an ablated target accelerated to form cerium oxide, the thin film was noncrystalline and no Faraday rotation occurred
Keywords :
Faraday effect; cerium compounds; garnets; magnetic field measurement; magnetic thin films; magneto-optical sensors; pulsed laser deposition; yttrium compounds; 430 nm; 900 C; Ce0.6Y2.4Fe5O12; Faraday rotation; YIG thin film; cerium substitution; charge state control; crystalline structure; fabrication; magnetic field sensor; pulsed laser deposition; Cerium; Crystallization; Fabrication; Garnet films; Iron; Magnetic films; Magnetic sensors; Sputtering; Thin film sensors; Yttrium;
Journal_Title :
Magnetics, IEEE Transactions on
