FePt thin films were epitaxially grown by RF sputtering on MgO (1 0 0) substrates at 550 1C, followed by in situ annealing at the sametemperature. The in situ annealing was found to improve the magnetic characteristics: i.e., the increase in magnetic squareness up to 0.9and increase in the ratio between anisotropy and coercivity (e ¼ anisotropy field/coercive field ¼ 35.9 for 115 min annealing).Remarkably, a decrease in grain size was also found to occur by increasing the annealing time.r 2007 Elsevier B.V. All rights reserved.
Grain size reduction and magnetic properties improvement by in-situ annealing of FePt epitaxial thin films / F., Albertini; L., Nasi; F., Casoli; S., Fabbrici; P., Luches; Rota, Alberto; Valeri, Sergio. - In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - ISSN 0304-8853. - STAMPA. - 316:2(2007), pp. e158-e161. [10.1016/j.jmmm.2007.02.074]
Grain size reduction and magnetic properties improvement by in-situ annealing of FePt epitaxial thin films
ROTA, Alberto;VALERI, Sergio
2007
Abstract
FePt thin films were epitaxially grown by RF sputtering on MgO (1 0 0) substrates at 550 1C, followed by in situ annealing at the sametemperature. The in situ annealing was found to improve the magnetic characteristics: i.e., the increase in magnetic squareness up to 0.9and increase in the ratio between anisotropy and coercivity (e ¼ anisotropy field/coercive field ¼ 35.9 for 115 min annealing).Remarkably, a decrease in grain size was also found to occur by increasing the annealing time.r 2007 Elsevier B.V. All rights reserved.
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