Effect of a change in thickness on the structural and perpendicular magnetic properties of L10 ordered FePd ultra-thin films with (001) texture

Jungho Ko, Taejin Bae, Jongill Hong

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Ultra-thin FePd films were prepared by the sputter-deposition of Fe and Pd layers. After annealing at 500°C, they transformed to a (001) oriented L10 ordered phase from an A1 disordered phase and changed their anisotropy to perpendicular magnetic anisotropy from in-plane. The ordered parameter was about 0.7 for all thicknesses of the FePd films. The 20nm-thick FePd film exhibited the squareness of 0.3 because both the disordered phase with in-plane magnetic anisotropy and ordered phase with perpendicular magnetic anisotropy existed in the FePd film. The disordered phase was reduced, and the L10 phase became predominated as the thickness of the FePd films decreased. In particular, when the FePd films were 3 and 5nm thick, the squareness became unity while maintaining a thermal stability factor of over 60. The uniaxial magnetic anisotropy constant Ku was over 1×107erg/cm3. Those characters make ultra-thin L10 FePd films suitable for use in nano-devices for magnetic applications.

Original languageEnglish
Article number113919
JournalJournal of Applied Physics
Volume112
Issue number11
DOIs
Publication statusPublished - 2012 Dec 1

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textures
magnetic properties
anisotropy
thin films
thick films
unity
thermal stability
annealing

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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title = "Effect of a change in thickness on the structural and perpendicular magnetic properties of L10 ordered FePd ultra-thin films with (001) texture",
abstract = "Ultra-thin FePd films were prepared by the sputter-deposition of Fe and Pd layers. After annealing at 500°C, they transformed to a (001) oriented L10 ordered phase from an A1 disordered phase and changed their anisotropy to perpendicular magnetic anisotropy from in-plane. The ordered parameter was about 0.7 for all thicknesses of the FePd films. The 20nm-thick FePd film exhibited the squareness of 0.3 because both the disordered phase with in-plane magnetic anisotropy and ordered phase with perpendicular magnetic anisotropy existed in the FePd film. The disordered phase was reduced, and the L10 phase became predominated as the thickness of the FePd films decreased. In particular, when the FePd films were 3 and 5nm thick, the squareness became unity while maintaining a thermal stability factor of over 60. The uniaxial magnetic anisotropy constant Ku was over 1×107erg/cm3. Those characters make ultra-thin L10 FePd films suitable for use in nano-devices for magnetic applications.",
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T1 - Effect of a change in thickness on the structural and perpendicular magnetic properties of L10 ordered FePd ultra-thin films with (001) texture

AU - Ko, Jungho

AU - Bae, Taejin

AU - Hong, Jongill

PY - 2012/12/1

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N2 - Ultra-thin FePd films were prepared by the sputter-deposition of Fe and Pd layers. After annealing at 500°C, they transformed to a (001) oriented L10 ordered phase from an A1 disordered phase and changed their anisotropy to perpendicular magnetic anisotropy from in-plane. The ordered parameter was about 0.7 for all thicknesses of the FePd films. The 20nm-thick FePd film exhibited the squareness of 0.3 because both the disordered phase with in-plane magnetic anisotropy and ordered phase with perpendicular magnetic anisotropy existed in the FePd film. The disordered phase was reduced, and the L10 phase became predominated as the thickness of the FePd films decreased. In particular, when the FePd films were 3 and 5nm thick, the squareness became unity while maintaining a thermal stability factor of over 60. The uniaxial magnetic anisotropy constant Ku was over 1×107erg/cm3. Those characters make ultra-thin L10 FePd films suitable for use in nano-devices for magnetic applications.

AB - Ultra-thin FePd films were prepared by the sputter-deposition of Fe and Pd layers. After annealing at 500°C, they transformed to a (001) oriented L10 ordered phase from an A1 disordered phase and changed their anisotropy to perpendicular magnetic anisotropy from in-plane. The ordered parameter was about 0.7 for all thicknesses of the FePd films. The 20nm-thick FePd film exhibited the squareness of 0.3 because both the disordered phase with in-plane magnetic anisotropy and ordered phase with perpendicular magnetic anisotropy existed in the FePd film. The disordered phase was reduced, and the L10 phase became predominated as the thickness of the FePd films decreased. In particular, when the FePd films were 3 and 5nm thick, the squareness became unity while maintaining a thermal stability factor of over 60. The uniaxial magnetic anisotropy constant Ku was over 1×107erg/cm3. Those characters make ultra-thin L10 FePd films suitable for use in nano-devices for magnetic applications.

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