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Phys. Rev. B 60, 373 - 382 (1999)

Anderson localization of 3d Mn states in semi-Heusler phases

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K. Kaczmarska
Institute of Physics, Silesian University, Uniwersytecka 4, 40007 Katowice, Poland

J. Pierre
Laboratoire L. Néel, C.N.R.S., 166X, 38042 Grenoble, France

J. Tobola
Faculty of Physics and Nuclear Techniques, Academy of Mining and Metallurgy, Al. Mickiewicza, 30-058 Krakow, Poland

R. V. Skolozdra
Department of Inorganic Chemistry, I. Franko University, 290005 Lviv, Ukraine

Received 9 December 1998

The solid solutions NiTi1-xMnxSb and CoV1-xMnxSb between metallic compounds are studied. For low Mn concentrations, Mn 3d states are localized as shown by magnetic measurements and electronic structure calculations. Magnetic interactions suddenly and strongly increase near x=0.4, while a semiconductinglike behavior is observed in the range x=0.35–0.45. These features are tentatively explained by the Anderson localization of d states in these disordered solutions. Large magnetoresistance effects are observed in some phases near their magnetic ordering temperature.


©1999 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevB.60.373
DOI: 10.1103/PhysRevB.60.373
PACS: 75.20.Hr, 71.55.Jv

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