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Journal of Applied Physics / Volume 111 / Issue 7 / PROCEEDINGS OF THE 56TH ANNUAL CONFERENCE ON MAGNETISM AND MAGNETIC MATERIALS / Hard Magnetic Materials

J. Appl. Phys. 111, 07A702 (2012); http://dx.doi.org/10.1063/1.3670515 (3 pages)

Effect of intrinsic tensile stress on (001) orientation in L10 FePt thin films on glass substrates

S. N. Hsiao1, S. H. Liu2, S. K. Chen2, F. T. Yuan3, and H. Y. Lee1

1National Synchrotron Radiation Research Center, Hsinchu, 30077, Taiwan
2Department of Materials Science and Engineering, Feng Chia University, Taichung, 40724, Taiwan
3Institude of Applied Physics and Center for Nanostorage, National Taiwan University, Taipei, 106, Taiwan

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(Received 22 September 2011; accepted 12 October 2011; published online 8 February 2012)

Single-layered FePt thin films were deposited on glass substrates and subsequently annealed at 800 °C for various times in a rapid thermal annealing (RTA) furnace. Near-fully-L10-ordered FePt films were obtained after RTA. The accumulation of the intrinsic tensile stress is mainly contributed by the densification reaction, which leads to the development of (001) preferred orientation. The relief of the tensile stress predominantly stems from the microstructural variation (from continuous to interconnected network state), resulting in a reduction of (001) texture. Enhanced perpendicular magnetic and crystalline anisotropy was obtained for the films annealed for 900 s, confirmed by a high Lotgering orientation factor of 0.99 and differential squareness of 0.5. The results provide direct evidence that intrinsic tensile stress prompts the (001) preferred orientation through suggested strain-induced grain growth.

© 2012 American Institute of Physics

KEYWORDS, PACS, and IPC

Keywords

crystal microstructure, crystal structure, densification, ferromagnetic materials, grain growth, internal stresses, iron alloys, magnetic hysteresis, magnetic thin films, metallic thin films, perpendicular magnetic anisotropy, platinum alloys, rapid thermal annealing, stress effects, texture

PACS

  • 68.55.jm

    Texture

  • 81.40.Ef

    Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization

  • 68.60.Bs

    Mechanical and acoustical properties

  • 75.70.Ak

    Magnetic properties of monolayers and thin films

  • 75.30.Gw

    Magnetic anisotropy

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

International Patent Classification (IPC)

  • C22C38/00

    Ferrous alloys, e.g. steel alloys

  • C21D1/00

    General methods or devices for heat treatment, e.g. annealing, hardening, quenching, tempering

  • H01F1/00

    Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties

  • H01F10/00

    Thin magnetic films, e.g. of one-domain structure

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3670515

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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