Title :
Photothermal characterization of multi-layer magnetic materials
Author :
Wang, Zhao Qiu ; Newman, Dave M. ; Carey, Roy
Author_Institution :
Sch. of Natural & Environ. Sci., Coventry Univ., UK
fDate :
9/1/2000 12:00:00 AM
Abstract :
In magnetic media thermal transport properties are sensitive to the large internal field associated with the magnetization. Using photoacoustic detection, we show how measurement of the amplitude of thermal waves traversing a magnetic medium provides a technique with the potential to separate the magnetic characteristics of different layers in a multi-layer structure. The technique is demonstrated by recovering the hysteresis loops of magnetic films in tri-layer structures with thick (100 nm) nonmagnetic capping layers
Keywords :
magnetic hysteresis; magnetic multilayers; magnetic variables measurement; photothermal effects; hysteresis loops; large internal field; magnetic characteristics; magnetic films; magnetization; multilayer magnetic materials; nonmagnetic capping layers; photoacoustic detection; photothermal characterization; thermal wave amplitude; trilayer structures; Magnetic films; Magnetic hysteresis; Magnetic materials; Magnetic properties; Magnetic separation; Magnetization; Magnetooptic effects; Magnetooptic recording; Magnetostatic waves; Thermal conductivity;
Journal_Title :
Magnetics, IEEE Transactions on
