Tunable ferromagnetic and antiferromagnetic interfacial exchange coupling in perpendicularly magnetized L10-MnGa/Co2FeAl Heusler bilayers

Q. L. Ma; S. Mizukami; X. M. Zhang; T. Miyazaki

doi:10.1063/1.4904348

Tunable ferromagnetic and antiferromagnetic interfacial exchange coupling in perpendicularly magnetized L1₀-MnGa/Co₂FeAl Heusler bilayers

Q. L. Ma, S. Mizukami, X. M. Zhang, T. Miyazaki

Advanced Institute for Materials Research (AIMR)

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

9 Citations (Scopus)

Abstract

In this work, we report a tailorable exchange coupling (J_ex) at the Mn₆₂Ga₃₈/Co₂FeAl interface, where Mn₆₂Ga₃₈ and Co₂FeAl alloys are tetragonal Heusler alloy with high perpendicular magnetic anisotropy and typical cubic Heusler alloy with soft magnetism, respectively. As the post annealing temperature (T_a) is lower than 375 °C, the J_ex is ferromagnetic with strength controllable from 7.5 to 0.5 erg/cm². Interestingly, as T_a increases higher than 400 °C, an antiferromagnetic J_ex of -5.5 erg/cm² is observed. The ferromagnetic/antiferromagnetic transition is further evidenced by the spin dependent transport property of the magnetic tunnel junctions with Mn₆₂Ga₃₈/Co₂FeAl as electrode. Based on structure characterization, the variation of J_ex during annealing is discussed.

Original language	English
Article number	233904
Journal	Journal of Applied Physics
Volume	116
Issue number	23
DOIs	https://doi.org/10.1063/1.4904348
Publication status	Published - 2014 Dec 21

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.4904348

Cite this

@article{97c7385cc2314e538fd84983e164608c,

title = "Tunable ferromagnetic and antiferromagnetic interfacial exchange coupling in perpendicularly magnetized L10-MnGa/Co2FeAl Heusler bilayers",

abstract = "In this work, we report a tailorable exchange coupling (Jex) at the Mn62Ga38/Co2FeAl interface, where Mn62Ga38 and Co2FeAl alloys are tetragonal Heusler alloy with high perpendicular magnetic anisotropy and typical cubic Heusler alloy with soft magnetism, respectively. As the post annealing temperature (Ta) is lower than 375 °C, the Jex is ferromagnetic with strength controllable from 7.5 to 0.5 erg/cm2. Interestingly, as Ta increases higher than 400 °C, an antiferromagnetic Jex of -5.5 erg/cm2 is observed. The ferromagnetic/antiferromagnetic transition is further evidenced by the spin dependent transport property of the magnetic tunnel junctions with Mn62Ga38/Co2FeAl as electrode. Based on structure characterization, the variation of Jex during annealing is discussed.",

author = "Ma, {Q. L.} and S. Mizukami and Zhang, {X. M.} and T. Miyazaki",

note = "Publisher Copyright: {\textcopyright} 2014 AIP Publishing LLC.",

year = "2014",

month = dec,

day = "21",

doi = "10.1063/1.4904348",

language = "English",

volume = "116",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics Publising LLC",

number = "23",

}

TY - JOUR

T1 - Tunable ferromagnetic and antiferromagnetic interfacial exchange coupling in perpendicularly magnetized L10-MnGa/Co2FeAl Heusler bilayers

AU - Ma, Q. L.

AU - Mizukami, S.

AU - Zhang, X. M.

AU - Miyazaki, T.

PY - 2014/12/21

Y1 - 2014/12/21

N2 - In this work, we report a tailorable exchange coupling (Jex) at the Mn62Ga38/Co2FeAl interface, where Mn62Ga38 and Co2FeAl alloys are tetragonal Heusler alloy with high perpendicular magnetic anisotropy and typical cubic Heusler alloy with soft magnetism, respectively. As the post annealing temperature (Ta) is lower than 375 °C, the Jex is ferromagnetic with strength controllable from 7.5 to 0.5 erg/cm2. Interestingly, as Ta increases higher than 400 °C, an antiferromagnetic Jex of -5.5 erg/cm2 is observed. The ferromagnetic/antiferromagnetic transition is further evidenced by the spin dependent transport property of the magnetic tunnel junctions with Mn62Ga38/Co2FeAl as electrode. Based on structure characterization, the variation of Jex during annealing is discussed.

AB - In this work, we report a tailorable exchange coupling (Jex) at the Mn62Ga38/Co2FeAl interface, where Mn62Ga38 and Co2FeAl alloys are tetragonal Heusler alloy with high perpendicular magnetic anisotropy and typical cubic Heusler alloy with soft magnetism, respectively. As the post annealing temperature (Ta) is lower than 375 °C, the Jex is ferromagnetic with strength controllable from 7.5 to 0.5 erg/cm2. Interestingly, as Ta increases higher than 400 °C, an antiferromagnetic Jex of -5.5 erg/cm2 is observed. The ferromagnetic/antiferromagnetic transition is further evidenced by the spin dependent transport property of the magnetic tunnel junctions with Mn62Ga38/Co2FeAl as electrode. Based on structure characterization, the variation of Jex during annealing is discussed.

UR - http://www.scopus.com/inward/record.url?scp=84919667881&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84919667881&partnerID=8YFLogxK

U2 - 10.1063/1.4904348

DO - 10.1063/1.4904348

M3 - Article

AN - SCOPUS:84919667881

SN - 0021-8979

VL - 116

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 23

M1 - 233904

ER -

Tunable ferromagnetic and antiferromagnetic interfacial exchange coupling in perpendicularly magnetized L1₀-MnGa/Co₂FeAl Heusler bilayers

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this