Title :
Thermoreflection measurement of magnetic thin films
Author :
Yang, Hang Zhou ; Leong, S.H. ; An, C.W. ; Chen, Y.J. ; Ye, K.D. ; Ng, L.T. ; Zhang, Juyong ; Ng, Kang Kee ; Hu, Jiang Feng
Author_Institution :
Data Storage Inst., A-star, Singapore, Singapore
fDate :
Oct. 31 2012-Nov. 2 2012
Abstract :
With recent developments in Heat Assisted Magnetic Recording (HAMR), there is growing intense interest in the thermal-optical properties of the HAMR media. We detect the phase change of the optical beam as it reflects from a FePt thin film under strong thermal gradient by carrying out Close-Aperture reflection Z-scan experiments. It was found that the far field spatial distribution of the reflected beam is sensitive and dependent on the thermal field distribution in the media. This experiment technique can be extended to study the spatial distribution of the thermal field in the HAMR media and to enable temperature measurement of HAMR media under laser irradiation.
Keywords :
iron alloys; laser beam applications; magnetic recording; magnetic thin films; metallic thin films; platinum alloys; thermoreflectance; FePt; close-aperture reflection Z-scan; far field spatial distribution; heat assisted magnetic recording; laser irradiation; magnetic thin films; optical beam; thermal field distribution; thermal gradient; thermal-optical properties; thermoreflection; Magnetic films; Magnetic properties; Measurement by laser beam; Media; Optical films; Optical reflection; Optical variables measurement; HAMR; Z-scan; magnetic thin film; thermal field distribution;
Conference_Titel :
APMRC, 2012 Digest
Conference_Location :
Singapore
Print_ISBN :
978-1-4673-4734-1
