Co2MnSi Heusler alloy as an enhancing layer of perpendicular magnetic anisotropy for MgO-based magnetic tunnel junctions with L10 ordered FePd

Taejin Bae, Jungho Ko, Sangho Lee, Jongin Cha, Jongill Hong

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Ultra-thin Co2MnSi Heusler alloy improves perpendicular magnetic anisotropy of FePd in an MgO-based magnetic tunnel junction after annealing it just once at a temperature of as low as 400 °C. Co2MnSi as thin as 1.0nm inserted between MgO and FePd facilitated phase-transformation of 3-nm-thick FePd to ordered L10 and led a change in magnetic anisotropy to perpendicular-to-the-plane. To make it even better, FePd also helped the phase-transformation of Co2MnSi to ordered B2 known to have high spin polarization, which makes the L10 FePd/B2 Co2MnSi bilayer promising for perpendicular-magnetic tunnel junction and improving both thermal stability and tunnel magnetoresistance.

Original languageEnglish
Article number013001
JournalJapanese Journal of Applied Physics
Volume55
Issue number1
DOIs
Publication statusPublished - 2016 Jan 1

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Tunnel junctions
Magnetic anisotropy
tunnel junctions
phase transformations
Phase transitions
anisotropy
Spin polarization
Magnetoresistance
tunnels
Tunnels
Thermodynamic stability
thermal stability
Annealing
annealing
polarization
Temperature
temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

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title = "Co2MnSi Heusler alloy as an enhancing layer of perpendicular magnetic anisotropy for MgO-based magnetic tunnel junctions with L10 ordered FePd",
abstract = "Ultra-thin Co2MnSi Heusler alloy improves perpendicular magnetic anisotropy of FePd in an MgO-based magnetic tunnel junction after annealing it just once at a temperature of as low as 400 °C. Co2MnSi as thin as 1.0nm inserted between MgO and FePd facilitated phase-transformation of 3-nm-thick FePd to ordered L10 and led a change in magnetic anisotropy to perpendicular-to-the-plane. To make it even better, FePd also helped the phase-transformation of Co2MnSi to ordered B2 known to have high spin polarization, which makes the L10 FePd/B2 Co2MnSi bilayer promising for perpendicular-magnetic tunnel junction and improving both thermal stability and tunnel magnetoresistance.",
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Co2MnSi Heusler alloy as an enhancing layer of perpendicular magnetic anisotropy for MgO-based magnetic tunnel junctions with L10 ordered FePd. / Bae, Taejin; Ko, Jungho; Lee, Sangho; Cha, Jongin; Hong, Jongill.

In: Japanese Journal of Applied Physics, Vol. 55, No. 1, 013001, 01.01.2016.

Research output: Contribution to journalArticle

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T1 - Co2MnSi Heusler alloy as an enhancing layer of perpendicular magnetic anisotropy for MgO-based magnetic tunnel junctions with L10 ordered FePd

AU - Bae, Taejin

AU - Ko, Jungho

AU - Lee, Sangho

AU - Cha, Jongin

AU - Hong, Jongill

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AB - Ultra-thin Co2MnSi Heusler alloy improves perpendicular magnetic anisotropy of FePd in an MgO-based magnetic tunnel junction after annealing it just once at a temperature of as low as 400 °C. Co2MnSi as thin as 1.0nm inserted between MgO and FePd facilitated phase-transformation of 3-nm-thick FePd to ordered L10 and led a change in magnetic anisotropy to perpendicular-to-the-plane. To make it even better, FePd also helped the phase-transformation of Co2MnSi to ordered B2 known to have high spin polarization, which makes the L10 FePd/B2 Co2MnSi bilayer promising for perpendicular-magnetic tunnel junction and improving both thermal stability and tunnel magnetoresistance.

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