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Title: Mechanism of coercivity enhancement by Ag addition in FePt-C granular films for heat assisted magnetic recording media

Abstract

We investigated the Ag distribution in a FePtAg-C granular film that is under consideration for a heat assisted magnetic recording medium by aberration-corrected scanning transmission electron microscope-energy dispersive X-ray spectroscopy and X-ray absorption fine structure. Ag is rejected from the core of FePt grains during the deposition, forming Ag-enriched shell surrounding L1{sub 0}-ordered FePt grains. Since Ag has no solubility in both Fe and Pt, the rejection of Ag induces atomic diffusions thereby enhancing the kinetics of the L1{sub 0}-order in the FePt grains.

Authors:
;  [1]; ; ; ; ;  [2]
  1. National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047 (Japan)
  2. Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), 1-1-1 Kouto, Sayo, Hyogo 679-5198 (Japan)
Publication Date:
OSTI Identifier:
22300103
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 104; Journal Issue: 22; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; CARBON; COERCIVE FORCE; DEPOSITION; DIFFUSION; DISTRIBUTION; FILMS; FINE STRUCTURE; GRANULAR MATERIALS; HEAT; IRON COMPOUNDS; PLATINUM COMPOUNDS; SILVER ADDITIONS; TRANSMISSION ELECTRON MICROSCOPY; X RADIATION; X-RAY SPECTROSCOPY

Citation Formats

Varaprasad, B. S. D. Ch. S., Takahashi, Y. K., E-mail: takahashi.yukiko@nims.go.jp, Wang, J., Hono, K., Ina, T., Nakamura, T., Ueno, W., Nitta, K., and Uruga, T. Mechanism of coercivity enhancement by Ag addition in FePt-C granular films for heat assisted magnetic recording media. United States: N. p., 2014. Web. doi:10.1063/1.4880655.
Varaprasad, B. S. D. Ch. S., Takahashi, Y. K., E-mail: takahashi.yukiko@nims.go.jp, Wang, J., Hono, K., Ina, T., Nakamura, T., Ueno, W., Nitta, K., & Uruga, T. Mechanism of coercivity enhancement by Ag addition in FePt-C granular films for heat assisted magnetic recording media. United States. https://doi.org/10.1063/1.4880655
Varaprasad, B. S. D. Ch. S., Takahashi, Y. K., E-mail: takahashi.yukiko@nims.go.jp, Wang, J., Hono, K., Ina, T., Nakamura, T., Ueno, W., Nitta, K., and Uruga, T. 2014. "Mechanism of coercivity enhancement by Ag addition in FePt-C granular films for heat assisted magnetic recording media". United States. https://doi.org/10.1063/1.4880655.
@article{osti_22300103,
title = {Mechanism of coercivity enhancement by Ag addition in FePt-C granular films for heat assisted magnetic recording media},
author = {Varaprasad, B. S. D. Ch. S. and Takahashi, Y. K., E-mail: takahashi.yukiko@nims.go.jp and Wang, J. and Hono, K. and Ina, T. and Nakamura, T. and Ueno, W. and Nitta, K. and Uruga, T.},
abstractNote = {We investigated the Ag distribution in a FePtAg-C granular film that is under consideration for a heat assisted magnetic recording medium by aberration-corrected scanning transmission electron microscope-energy dispersive X-ray spectroscopy and X-ray absorption fine structure. Ag is rejected from the core of FePt grains during the deposition, forming Ag-enriched shell surrounding L1{sub 0}-ordered FePt grains. Since Ag has no solubility in both Fe and Pt, the rejection of Ag induces atomic diffusions thereby enhancing the kinetics of the L1{sub 0}-order in the FePt grains.},
doi = {10.1063/1.4880655},
url = {https://www.osti.gov/biblio/22300103}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 22,
volume = 104,
place = {United States},
year = {Mon Jun 02 00:00:00 EDT 2014},
month = {Mon Jun 02 00:00:00 EDT 2014}
}