Interdiffusion in epitaxial ultrathin Co2FeAl/MgO heterostructures with interface-induced perpendicular magnetic anisotropy

Zhenchao Wen; Jason Paul Hadorn; Jun Okabayashi; Hiroaki Sukegawa; Tadakatsu Ohkubo; Koichiro Inomata; Seiji Mitani; Kazuhiro Hono

doi:10.7567/APEX.10.013003

Interdiffusion in epitaxial ultrathin Co₂FeAl/MgO heterostructures with interface-induced perpendicular magnetic anisotropy

Zhenchao Wen, Jason Paul Hadorn, Jun Okabayashi, Hiroaki Sukegawa, Tadakatsu Ohkubo, Koichiro Inomata, Seiji Mitani, Kazuhiro Hono

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

The interfacial atomic structure of epitaxial ultrathin Co2FeAl/MgO(001) heterostructures, which is related to the interface-induced perpendicular magnetic anisotropy (PMA), was investigated using scanning transmission electron microscopy, energy dispersive X-ray spectroscopy, and X-ray magnetic circular dichroism. Al atoms from the Co2FeAl layer significantly interdiffused into MgO, forming an Al-deficient Co-Fe-Al/Mg-Al-O structure near the Co2FeAl/MgO interface. This atomic replacement may have enhanced the PMA, which is consistent with the observed large perpendicular orbital magnetic moments of Fe atoms at the interface. This work suggests that control of interdiffusion at ferromagnet/barrier interfaces is critical for designing an interface-induced PMA system.

Original language	English
Article number	013003
Journal	Applied Physics Express
Volume	10
Issue number	1
DOIs	https://doi.org/10.7567/APEX.10.013003
Publication status	Published - 2017 Jan
Externally published	Yes

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

Access to Document

10.7567/APEX.10.013003

Cite this

Interdiffusion in epitaxial ultrathin Co₂FeAl/MgO heterostructures with interface-induced perpendicular magnetic anisotropy. / Wen, Zhenchao; Hadorn, Jason Paul; Okabayashi, Jun; Sukegawa, Hiroaki; Ohkubo, Tadakatsu; Inomata, Koichiro; Mitani, Seiji; Hono, Kazuhiro.

In: Applied Physics Express, Vol. 10, No. 1, 013003, 01.2017.

Research output: Contribution to journal › Article › peer-review

@article{64b9ba599a354c83b7a292e14b0dce83,

title = "Interdiffusion in epitaxial ultrathin Co2FeAl/MgO heterostructures with interface-induced perpendicular magnetic anisotropy",

abstract = "The interfacial atomic structure of epitaxial ultrathin Co2FeAl/MgO(001) heterostructures, which is related to the interface-induced perpendicular magnetic anisotropy (PMA), was investigated using scanning transmission electron microscopy, energy dispersive X-ray spectroscopy, and X-ray magnetic circular dichroism. Al atoms from the Co2FeAl layer significantly interdiffused into MgO, forming an Al-deficient Co-Fe-Al/Mg-Al-O structure near the Co2FeAl/MgO interface. This atomic replacement may have enhanced the PMA, which is consistent with the observed large perpendicular orbital magnetic moments of Fe atoms at the interface. This work suggests that control of interdiffusion at ferromagnet/barrier interfaces is critical for designing an interface-induced PMA system.",

author = "Zhenchao Wen and Hadorn, {Jason Paul} and Jun Okabayashi and Hiroaki Sukegawa and Tadakatsu Ohkubo and Koichiro Inomata and Seiji Mitani and Kazuhiro Hono",

note = "Publisher Copyright: {\textcopyright} 2017 The Japan Society of Applied Physics.",

year = "2017",

month = jan,

doi = "10.7567/APEX.10.013003",

language = "English",

volume = "10",

journal = "Applied Physics Express",

issn = "1882-0778",

publisher = "Japan Society of Applied Physics",

number = "1",

}

TY - JOUR

T1 - Interdiffusion in epitaxial ultrathin Co2FeAl/MgO heterostructures with interface-induced perpendicular magnetic anisotropy

AU - Wen, Zhenchao

AU - Hadorn, Jason Paul

AU - Okabayashi, Jun

AU - Sukegawa, Hiroaki

AU - Ohkubo, Tadakatsu

AU - Inomata, Koichiro

AU - Mitani, Seiji

AU - Hono, Kazuhiro

PY - 2017/1

Y1 - 2017/1

N2 - The interfacial atomic structure of epitaxial ultrathin Co2FeAl/MgO(001) heterostructures, which is related to the interface-induced perpendicular magnetic anisotropy (PMA), was investigated using scanning transmission electron microscopy, energy dispersive X-ray spectroscopy, and X-ray magnetic circular dichroism. Al atoms from the Co2FeAl layer significantly interdiffused into MgO, forming an Al-deficient Co-Fe-Al/Mg-Al-O structure near the Co2FeAl/MgO interface. This atomic replacement may have enhanced the PMA, which is consistent with the observed large perpendicular orbital magnetic moments of Fe atoms at the interface. This work suggests that control of interdiffusion at ferromagnet/barrier interfaces is critical for designing an interface-induced PMA system.

AB - The interfacial atomic structure of epitaxial ultrathin Co2FeAl/MgO(001) heterostructures, which is related to the interface-induced perpendicular magnetic anisotropy (PMA), was investigated using scanning transmission electron microscopy, energy dispersive X-ray spectroscopy, and X-ray magnetic circular dichroism. Al atoms from the Co2FeAl layer significantly interdiffused into MgO, forming an Al-deficient Co-Fe-Al/Mg-Al-O structure near the Co2FeAl/MgO interface. This atomic replacement may have enhanced the PMA, which is consistent with the observed large perpendicular orbital magnetic moments of Fe atoms at the interface. This work suggests that control of interdiffusion at ferromagnet/barrier interfaces is critical for designing an interface-induced PMA system.

UR - http://www.scopus.com/inward/record.url?scp=85009128826&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85009128826&partnerID=8YFLogxK

U2 - 10.7567/APEX.10.013003

DO - 10.7567/APEX.10.013003

M3 - Article

AN - SCOPUS:85009128826

VL - 10

JO - Applied Physics Express

JF - Applied Physics Express

SN - 1882-0778

IS - 1

M1 - 013003

ER -

Interdiffusion in epitaxial ultrathin Co₂FeAl/MgO heterostructures with interface-induced perpendicular magnetic anisotropy

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this