Enhanced Curie temperature and spin polarization in Mn4 Fe Ge3

C. L. Chien; C. Petrovic

doi:10.1063/1.2794425

Enhanced Curie temperature and spin polarization in Mn4 Fe Ge3

C. L. Chien
, C. Petrovic

Arizona State University

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

33 Scopus citations

Abstract

Intermetallic ferromagnetic compound Mn5 Ge3, with Curie temperature TC =296 K, a spin polarization of P=42%, and a good lattice match to semiconductors, is a potential spin injector for spintronics. We report the enhanced magnetic properties and spin polarization of Mn4 Fe Ge3. By replacing one Mn atom in Mn5 Ge3 with Fe, the TC of Mn4 Fe Ge3 has been enhanced to 319.50 K, while still maintaining the same crystal structure, high electrical conductivity, and a high residual resistivity ratio of 5.33. More importantly, the spin polarization in excess of 60% of Mn4 Fe Ge3, much higher than that of Mn5 Ge3, has been realized.

Original language	English (US)
Article number	142505
Journal	Applied Physics Letters
Volume	91
Issue number	14
DOIs	https://doi.org/10.1063/1.2794425
State	Published - 2007

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Enhanced Curie temperature and spin polarization in Mn4 Fe Ge3",

abstract = "Intermetallic ferromagnetic compound Mn5 Ge3, with Curie temperature TC =296 K, a spin polarization of P=42\%, and a good lattice match to semiconductors, is a potential spin injector for spintronics. We report the enhanced magnetic properties and spin polarization of Mn4 Fe Ge3. By replacing one Mn atom in Mn5 Ge3 with Fe, the TC of Mn4 Fe Ge3 has been enhanced to 319.50 K, while still maintaining the same crystal structure, high electrical conductivity, and a high residual resistivity ratio of 5.33. More importantly, the spin polarization in excess of 60\% of Mn4 Fe Ge3, much higher than that of Mn5 Ge3, has been realized.",

author = "Chien, \{C. L.\} and C. Petrovic",

note = "Funding Information: This work has been supported by NSF, and part of this work was carried out at the Brookhaven National Laboratory which is operated for the U.S. Department of Energy by Brookhaven Science Associates (Contract No. DE-Ac02-98CH10886).",

year = "2007",

doi = "10.1063/1.2794425",

language = "English (US)",

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journal = "Applied Physics Letters",

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publisher = "American Institute of Physics",

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TY - JOUR

T1 - Enhanced Curie temperature and spin polarization in Mn4 Fe Ge3

AU - Chien, C. L.

AU - Petrovic, C.

N1 - Funding Information: This work has been supported by NSF, and part of this work was carried out at the Brookhaven National Laboratory which is operated for the U.S. Department of Energy by Brookhaven Science Associates (Contract No. DE-Ac02-98CH10886).

PY - 2007

Y1 - 2007

N2 - Intermetallic ferromagnetic compound Mn5 Ge3, with Curie temperature TC =296 K, a spin polarization of P=42%, and a good lattice match to semiconductors, is a potential spin injector for spintronics. We report the enhanced magnetic properties and spin polarization of Mn4 Fe Ge3. By replacing one Mn atom in Mn5 Ge3 with Fe, the TC of Mn4 Fe Ge3 has been enhanced to 319.50 K, while still maintaining the same crystal structure, high electrical conductivity, and a high residual resistivity ratio of 5.33. More importantly, the spin polarization in excess of 60% of Mn4 Fe Ge3, much higher than that of Mn5 Ge3, has been realized.

AB - Intermetallic ferromagnetic compound Mn5 Ge3, with Curie temperature TC =296 K, a spin polarization of P=42%, and a good lattice match to semiconductors, is a potential spin injector for spintronics. We report the enhanced magnetic properties and spin polarization of Mn4 Fe Ge3. By replacing one Mn atom in Mn5 Ge3 with Fe, the TC of Mn4 Fe Ge3 has been enhanced to 319.50 K, while still maintaining the same crystal structure, high electrical conductivity, and a high residual resistivity ratio of 5.33. More importantly, the spin polarization in excess of 60% of Mn4 Fe Ge3, much higher than that of Mn5 Ge3, has been realized.

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DO - 10.1063/1.2794425

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VL - 91

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 14

M1 - 142505

ER -

Enhanced Curie temperature and spin polarization in Mn4 Fe Ge3

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