Spin polarization of Fe4N thin films determined by point-contact Andreev reflection

A. Narahara; K. Ito; T. Suemasu; Y. K. Takahashi; A. Ranajikanth; K. Hono

doi:10.1063/1.3140459

Spin polarization of Fe₄N thin films determined by point-contact Andreev reflection

A. Narahara^*, K. Ito, T. Suemasu, Y. K. Takahashi, A. Ranajikanth, K. Hono

^*Corresponding author for this work

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

62 Citations (Scopus)

Abstract

The spin polarization of (100)-oriented γ′ -Fe4 N layers grown on MgO(001) substrates by molecular beam epitaxy was deduced from point contact Andreev reflection measurements, and the value was compared with that of α-Fe. The spin polarization (P) for γ′-Fe₄ N is approximately 0.59 at 7.8 K. This value is distinctly larger than that for α-Fe (P=0.49 at 7.8 K) measured with an identical setting. The mechanism of enhanced spin polarization in γ′ -Fe₄ N is discussed.

Original language	English
Article number	202502
Journal	Applied Physics Letters
Volume	94
Issue number	20
DOIs	https://doi.org/10.1063/1.3140459
Publication status	Published - 2009
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3140459

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@article{093f79966b0a4769b2e950591e9fe073,

title = "Spin polarization of Fe4N thin films determined by point-contact Andreev reflection",

abstract = "The spin polarization of (100)-oriented γ′ -Fe4 N layers grown on MgO(001) substrates by molecular beam epitaxy was deduced from point contact Andreev reflection measurements, and the value was compared with that of α-Fe. The spin polarization (P) for γ′-Fe4 N is approximately 0.59 at 7.8 K. This value is distinctly larger than that for α-Fe (P=0.49 at 7.8 K) measured with an identical setting. The mechanism of enhanced spin polarization in γ′ -Fe4 N is discussed.",

author = "A. Narahara and K. Ito and T. Suemasu and Takahashi, {Y. K.} and A. Ranajikanth and K. Hono",

note = "Funding Information: This work was supported in part by the World Premier International Research Center (WPI) Initiative on Materials Nanoarchitronics, MEXT, Grant-in-Aid for Scientific Research on Priority Area on “Creation and Control of Spin Current” Grant No. 19048029 from MEXT, PREST-JST, and the NanoProcessing Partnership Platform (NPPP) at AIST, Tsukuba. ",

year = "2009",

doi = "10.1063/1.3140459",

language = "English",

volume = "94",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "20",

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TY - JOUR

T1 - Spin polarization of Fe4N thin films determined by point-contact Andreev reflection

AU - Narahara, A.

AU - Ito, K.

AU - Suemasu, T.

AU - Takahashi, Y. K.

AU - Ranajikanth, A.

AU - Hono, K.

N1 - Funding Information: This work was supported in part by the World Premier International Research Center (WPI) Initiative on Materials Nanoarchitronics, MEXT, Grant-in-Aid for Scientific Research on Priority Area on “Creation and Control of Spin Current” Grant No. 19048029 from MEXT, PREST-JST, and the NanoProcessing Partnership Platform (NPPP) at AIST, Tsukuba.

PY - 2009

Y1 - 2009

N2 - The spin polarization of (100)-oriented γ′ -Fe4 N layers grown on MgO(001) substrates by molecular beam epitaxy was deduced from point contact Andreev reflection measurements, and the value was compared with that of α-Fe. The spin polarization (P) for γ′-Fe4 N is approximately 0.59 at 7.8 K. This value is distinctly larger than that for α-Fe (P=0.49 at 7.8 K) measured with an identical setting. The mechanism of enhanced spin polarization in γ′ -Fe4 N is discussed.

AB - The spin polarization of (100)-oriented γ′ -Fe4 N layers grown on MgO(001) substrates by molecular beam epitaxy was deduced from point contact Andreev reflection measurements, and the value was compared with that of α-Fe. The spin polarization (P) for γ′-Fe4 N is approximately 0.59 at 7.8 K. This value is distinctly larger than that for α-Fe (P=0.49 at 7.8 K) measured with an identical setting. The mechanism of enhanced spin polarization in γ′ -Fe4 N is discussed.

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DO - 10.1063/1.3140459

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JO - Applied Physics Letters

JF - Applied Physics Letters

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M1 - 202502

ER -

Spin polarization of Fe₄N thin films determined by point-contact Andreev reflection

Abstract

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