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FMR and Magnetic Studies on Polycrystalline YIG Thin Films Deposited Using Pulsed Laser

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Title FMR and Magnetic Studies on Polycrystalline YIG Thin Films Deposited Using Pulsed Laser
 
Creator BHOI, B
VENKATARAMANI, N
AIYAR, RPRC
PRASAD, S
 
Subject Effective saturation magnetizations
Ferromagnetic resonance
linewidth
microwave
SUBSTRATE-TEMPERATURE
BEHAVIOR
 
Description Ferromagnetic resonance (FMR) and magnetic studies have been carried out on polycrystalline YIG films deposited by pulsed laser deposition (at T-S : 750 degrees C, O-2 : 5 x 10(-2) mbar) using a range of laser energies (240 to 350 mJ). The films were ex situ annealed (T-a : 700 degrees C, in air for 2 h). The film thickness increases from 100 to 290 nm for an hour of deposition with the increase in laser energy from 240 to 350 mJ. The FMR linewidth was found to reduce from 340 to 70 Oe for the same incremental variation in laser energy. Multiple resonance modes were observed in the perpendicular FMR spectra of our samples which are related to intrinsic as well as extrinsic mechanisms such as in homogeneities. Saturation magnetization measurement (M-s) is found to be dependent on the laser energy. The value of M-s is found to increase with laser energy and is close to 90% of the bulk value for the film with highest power. An attempt has been made to correlate the magnetization results with the microstructure.
 
Publisher IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
 
Date 2014-10-17T04:40:35Z
2014-10-17T04:40:35Z
2013
 
Type Article
 
Identifier IEEE TRANSACTIONS ON MAGNETICS, 49(3)990-994
http://dx.doi.org/10.1109/TMAG.2012.2228172
http://dspace.library.iitb.ac.in/jspui/handle/100/15973
 
Language en