Enhancement of electric field modulation of coercivity in Pt /Co/Al-O structures by tuning Co surface oxidation

Junichi Shiogai; Tatsuro Ohashi; Tim Yang; Makoto Kohda; Takeshi Seki; Koki Takanashi; Junsaku Nitta

doi:10.1088/0022-3727/49/3/03LT01

Enhancement of electric field modulation of coercivity in Pt /Co/Al-O structures by tuning Co surface oxidation

Junichi Shiogai, Tatsuro Ohashi, Tim Yang, Makoto Kohda, Takeshi Seki, Koki Takanashi, Junsaku Nitta

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

6 Citations (Scopus)

Abstract

The effect of the oxidation of the Co ferromagnetic layer on gate modulation of its coercivity was experimentally investigated in Pt / Co / Al-O heterostructures. The Co surfaces were naturally oxidized by exposing to atmosphere after Co layer growth, and the degree of oxidation was characterized by x-ray photoelectron spectroscopy (XPS). A comparison between XPS and magneto-transport results suggested that a moderate oxidation of the Co interface enhances the electric-field induced coercivity change, indicating the importance of interface engineering for electrical control of magnetization reversal.

Original language	English
Article number	03LT01
Journal	Journal of Physics D: Applied Physics
Volume	49
Issue number	3
DOIs	https://doi.org/10.1088/0022-3727/49/3/03LT01
Publication status	Published - 2015 Dec 2

Keywords

electric field effect
perpendicular magnetic anisotropy
spintronics

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Acoustics and Ultrasonics
Surfaces, Coatings and Films

Access to Document

10.1088/0022-3727/49/3/03LT01

Fingerprint Dive into the research topics of 'Enhancement of electric field modulation of coercivity in Pt /Co/Al-O structures by tuning Co surface oxidation'. Together they form a unique fingerprint.

Cite this

Enhancement of electric field modulation of coercivity in Pt /Co/Al-O structures by tuning Co surface oxidation. / Shiogai, Junichi; Ohashi, Tatsuro; Yang, Tim; Kohda, Makoto ; Seki, Takeshi ; Takanashi, Koki ; Nitta, Junsaku.

In: Journal of Physics D: Applied Physics, Vol. 49, No. 3, 03LT01, 02.12.2015.

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

@article{147bca349cc340048f642cb02b50c789,

title = "Enhancement of electric field modulation of coercivity in Pt /Co/Al-O structures by tuning Co surface oxidation",

abstract = "The effect of the oxidation of the Co ferromagnetic layer on gate modulation of its coercivity was experimentally investigated in Pt / Co / Al-O heterostructures. The Co surfaces were naturally oxidized by exposing to atmosphere after Co layer growth, and the degree of oxidation was characterized by x-ray photoelectron spectroscopy (XPS). A comparison between XPS and magneto-transport results suggested that a moderate oxidation of the Co interface enhances the electric-field induced coercivity change, indicating the importance of interface engineering for electrical control of magnetization reversal.",

keywords = "electric field effect, perpendicular magnetic anisotropy, spintronics",

author = "Junichi Shiogai and Tatsuro Ohashi and Tim Yang and Makoto Kohda and Takeshi Seki and Koki Takanashi and Junsaku Nitta",

year = "2015",

month = dec,

day = "2",

doi = "10.1088/0022-3727/49/3/03LT01",

language = "English",

volume = "49",

journal = "Journal Physics D: Applied Physics",

issn = "0022-3727",

publisher = "IOP Publishing Ltd.",

number = "3",

}

TY - JOUR

T1 - Enhancement of electric field modulation of coercivity in Pt /Co/Al-O structures by tuning Co surface oxidation

AU - Shiogai, Junichi

AU - Ohashi, Tatsuro

AU - Yang, Tim

AU - Kohda, Makoto

AU - Seki, Takeshi

AU - Takanashi, Koki

AU - Nitta, Junsaku

PY - 2015/12/2

Y1 - 2015/12/2

N2 - The effect of the oxidation of the Co ferromagnetic layer on gate modulation of its coercivity was experimentally investigated in Pt / Co / Al-O heterostructures. The Co surfaces were naturally oxidized by exposing to atmosphere after Co layer growth, and the degree of oxidation was characterized by x-ray photoelectron spectroscopy (XPS). A comparison between XPS and magneto-transport results suggested that a moderate oxidation of the Co interface enhances the electric-field induced coercivity change, indicating the importance of interface engineering for electrical control of magnetization reversal.

AB - The effect of the oxidation of the Co ferromagnetic layer on gate modulation of its coercivity was experimentally investigated in Pt / Co / Al-O heterostructures. The Co surfaces were naturally oxidized by exposing to atmosphere after Co layer growth, and the degree of oxidation was characterized by x-ray photoelectron spectroscopy (XPS). A comparison between XPS and magneto-transport results suggested that a moderate oxidation of the Co interface enhances the electric-field induced coercivity change, indicating the importance of interface engineering for electrical control of magnetization reversal.

KW - electric field effect

KW - perpendicular magnetic anisotropy

KW - spintronics

UR - http://www.scopus.com/inward/record.url?scp=84954089338&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84954089338&partnerID=8YFLogxK

U2 - 10.1088/0022-3727/49/3/03LT01

DO - 10.1088/0022-3727/49/3/03LT01

M3 - Article

AN - SCOPUS:84954089338

VL - 49

JO - Journal Physics D: Applied Physics

JF - Journal Physics D: Applied Physics

SN - 0022-3727

IS - 3

M1 - 03LT01

ER -