Tetragonal distortion and perpendicular magnetic anisotropy of FeCo layer in the FePt/ FeCo and FePt/Cu/FeCo films

B. Wang, H. Omiya, T. Hasegawa, T. Nakamura, L. Zhang, L. Liu, S. Ishio

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

ThThe combination of the large uniaxial magnetocrystalline anisotropy (7×107 erg/cm3) of L10 ordered FePt and the large Ms of FeCo is quite attractive for the practical application to high density magnetic recording media and for developing innovative permanent magnets [1,2]. Moreover, it is predicted by the first-principle calculations that the tetragonal distortion (c/a∼1.25) yields a large uniaxial MAE (700-800 μeV/atom) in FeCo alloys [2, 3]. There are two factors which are important to understand the magnetization process of FePt/FeCo bilayer films: one is the uniaxial magnetic anisotropy induced by a tetragonal distortion at the interface between FePt and FeCo layers and the other is an exchange coupling between two layers. In the present work, the tetragonal distortion in FeCo at the interface between FePt and FeCo layers is observed by XRD and TEM analysis, and the uniaxial magnetic anisotropy is evaluated from the magnetization process of FePt/FeCo and FePt/Cu/FeCo films. Correlation between the tetragonal distortion and magnetic anisotropy is studied.

Original languageEnglish
Title of host publication2015 IEEE International Magnetics Conference, INTERMAG 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479973224
DOIs
Publication statusPublished - 2015 Jul 14
Externally publishedYes
Event2015 IEEE International Magnetics Conference, INTERMAG 2015 - Beijing, China
Duration: 2015 May 112015 May 15

Publication series

Name2015 IEEE International Magnetics Conference, INTERMAG 2015

Other

Other2015 IEEE International Magnetics Conference, INTERMAG 2015
CountryChina
CityBeijing
Period15/5/1115/5/15

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Tetragonal distortion and perpendicular magnetic anisotropy of FeCo layer in the FePt/ FeCo and FePt/Cu/FeCo films'. Together they form a unique fingerprint.

Cite this