Spin polarization of quaternary Co 2Cr 1-xFe xAl Heusler alloys

S. V. Karthik; A. Rajanikanth; Y. K. Takahashi; T. Okhubo; K. Hono

doi:10.1063/1.2245224

Spin polarization of quaternary Co ₂Cr _1-xFe _xAl Heusler alloys

S. V. Karthik^*, A. Rajanikanth, Y. K. Takahashi, T. Okhubo, K. Hono

^*Corresponding author for this work

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

45 Citations (Scopus)

Abstract

Point contact Andreev reflection measurements of Co ₂Cr _1-xFe _xAl Heusler alloys showed that the spin polarization P decreases with x from P=0.62 for x=0.0 to P=0.54 for x=0.4 and then increases slightly to P=0.56 for x= 1.0. The deviation in P of the samples with x=0.0 and 0.4 from the theoretical predictions (P>0.9) can be accounted to the phase separation, whereas the deviation in P of the sample with x=1.0 from the theoretical predictions (P=0.3) suggests the lack of accuracy in density of state calculations.

Original language	English
Article number	052505
Journal	Applied Physics Letters
Volume	89
Issue number	5
DOIs	https://doi.org/10.1063/1.2245224
Publication status	Published - 2006
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2245224

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title = "Spin polarization of quaternary Co 2Cr 1-xFe xAl Heusler alloys",

abstract = "Point contact Andreev reflection measurements of Co 2Cr 1-xFe xAl Heusler alloys showed that the spin polarization P decreases with x from P=0.62 for x=0.0 to P=0.54 for x=0.4 and then increases slightly to P=0.56 for x= 1.0. The deviation in P of the samples with x=0.0 and 0.4 from the theoretical predictions (P>0.9) can be accounted to the phase separation, whereas the deviation in P of the sample with x=1.0 from the theoretical predictions (P=0.3) suggests the lack of accuracy in density of state calculations.",

author = "Karthik, {S. V.} and A. Rajanikanth and Takahashi, {Y. K.} and T. Okhubo and K. Hono",

note = "Funding Information: This work was in part supported by the Ministry of Education, Science, Sports and Culture of Japan, Grant-in-Aid for Scientific Research (B), 17360346, 2005. The authors thank Asano at Nagoya University and Mitani at Institute for Materials Research, Tohoku University, for valuable advice in the point contact Andreev reflection measurement and Inomata for discussion.",

year = "2006",

doi = "10.1063/1.2245224",

language = "English",

volume = "89",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

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T1 - Spin polarization of quaternary Co 2Cr 1-xFe xAl Heusler alloys

AU - Karthik, S. V.

AU - Rajanikanth, A.

AU - Takahashi, Y. K.

AU - Okhubo, T.

AU - Hono, K.

N1 - Funding Information: This work was in part supported by the Ministry of Education, Science, Sports and Culture of Japan, Grant-in-Aid for Scientific Research (B), 17360346, 2005. The authors thank Asano at Nagoya University and Mitani at Institute for Materials Research, Tohoku University, for valuable advice in the point contact Andreev reflection measurement and Inomata for discussion.

PY - 2006

Y1 - 2006

N2 - Point contact Andreev reflection measurements of Co 2Cr 1-xFe xAl Heusler alloys showed that the spin polarization P decreases with x from P=0.62 for x=0.0 to P=0.54 for x=0.4 and then increases slightly to P=0.56 for x= 1.0. The deviation in P of the samples with x=0.0 and 0.4 from the theoretical predictions (P>0.9) can be accounted to the phase separation, whereas the deviation in P of the sample with x=1.0 from the theoretical predictions (P=0.3) suggests the lack of accuracy in density of state calculations.

AB - Point contact Andreev reflection measurements of Co 2Cr 1-xFe xAl Heusler alloys showed that the spin polarization P decreases with x from P=0.62 for x=0.0 to P=0.54 for x=0.4 and then increases slightly to P=0.56 for x= 1.0. The deviation in P of the samples with x=0.0 and 0.4 from the theoretical predictions (P>0.9) can be accounted to the phase separation, whereas the deviation in P of the sample with x=1.0 from the theoretical predictions (P=0.3) suggests the lack of accuracy in density of state calculations.

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ER -

Spin polarization of quaternary Co ₂Cr _1-xFe _xAl Heusler alloys

Abstract

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