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  Large negative magnetoresistance effects in Co2Cr0.6Fe0.4Al

Block, T., Felser, C., Jakob, G., Ensling, J., Mühling, P., Gütlich, P., et al. (2003). Large negative magnetoresistance effects in Co2Cr0.6Fe0.4Al. Journal of Solid State Chemistry, 176(2), 646-651. doi:10.1016/j.jssc.2003.07.002.

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 Creators:
Block, T.1, Author
Felser, C.2, Author           
Jakob, G.1, Author
Ensling, J.1, Author
Mühling, P.1, Author
Gütlich, P.1, Author
Cava, R. J.1, Author
Affiliations:
1external, ou_persistent22              
2External Organizations, ou_persistent22              

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 Abstract: Materials, which display large changes in resistivity in response to an applied magnetic field (magnetoresistance) are currently of great interest due to their potential for applications in magnetic sensors, magnetic random access memories, and spintronics. Guided by striking features in the electronic structure of several magnetic compounds, we prepared the Heusler compound Co2Cr0.6Fe0.4Al. Based on our band structure calculations, we have chosen this composition in order to obtain a half-metallic ferromagnet with a van Hove singularity in the vicinity of the Fermi energy in the majority spin channel and a gap in the minority spin channel. We find a magnetoresistive effect of 30% in a small magnetic field of 0.1 T at room temperature. This demonstrates the feasibility of a cheap and simple magnetic sensor based on polycrystalline, intermetallic material.

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 Dates: 2003-12-01
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.jssc.2003.07.002
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Title: Journal of Solid State Chemistry
Source Genre: Journal
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Publ. Info: Orlando, Fla. : Academic Press
Pages: - Volume / Issue: 176 (2) Sequence Number: - Start / End Page: 646 - 651 Identifier: ISSN: 0022-4596
CoNE: https://pure.mpg.de/cone/journals/resource/954922646045