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Static and Dynamic Magnetic Domains of Epitaxial gamma '-Fe4N Thin Films

Atiq, S. and Siddiqi, S. A. and Ko, H. S. and Shin, S. C. (2009) Static and Dynamic Magnetic Domains of Epitaxial gamma '-Fe4N Thin Films. JOURNAL OF THE KOREAN PHYSICAL SOCIETY, 55 (3). pp. 925-929. ISSN 0374-4884

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Highly-ordered single-phase thin films of gamma'-Fe4N were deposited by dc magnetron sputtering directly on single-crystal MgO(100) substrates at different temperatures. The surface morphology showed that a very regular nano-sized grain structure gradually turned into a smooth layered growth with increasing temperature tip to 450 degrees C. The minimum root-mean-square value of the surface roughness was achieved after 30 minutes in-situ annealing at 450 degrees C. The epitaxial texture of the films was revealed by X-ray diffractometry Bi-axial in-plane magnetic anisotropy, characteristic of strong ferromagnetism, was observed from the quite squarish M-H loops obtained with the help of a vibrating sample magnetometer Bow-tieshaped static domain patterns and a very dense domain structure were direct evidence of strong exchange coupling among magnetic domains. Time-resolved dynamic magnetic domain patterns were observed in gamma'-Fe4N thin films by using a magneto-optic microscope magnetometer.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:7726
Deposited By:JNCASR
Deposited On:14 Nov 2009 08:43
Last Modified:14 Nov 2009 08:43

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