Magneto-optical properties of Bi-substituted garnet films prepared by pyrolysis

Abstract

The Bi <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</inf> DY <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3-x</inf> Fe <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3.8</inf> Al <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1.2</inf> O <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">12</inf> garnet films have been prepared by the pyrolysis of solutions containing appropriate nitrates on glass substrates. These films consisted of entirely garnet crystals with the average size of a few hundred angstroms. The hysteresis loops varied with the composition and the thickness of the films. This could be explained by the terms of the compensation point and the induced stress. The Faraday rotation angle greater than 2 degrees was obtained by a sample having the thickness of about 4200 A. Laser power of 3.5 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">mw</sup> for 5 µsec was satisfactory for recordings on these films.