Determination of the normal and anomalous hall effect coefficients in ferromagnetic Ni{sub 50}Mn{sub 35}In{sub 15-x}Si{sub x} Heusler alloys at the martensitic transformation

Journal Article · Thu Nov 15 00:00:00 EST 2012 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776112090051· OSTI ID:22069270

Prudnikov, V N; Kazakov, A P ^[1]; Zhukov, A P ^[2]; Dubenko, I S ^[3]

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1. Moscow State University (Russian Federation)
2. Ikerbasque, Basque Foundaiton for Science (Spain)
3. Southern Illinois University, Department of Physics (United States)

The magnetization, the electrical resistivity, the magnetoresistance, and the Hall resistivity of Ni{sub 50}Mn{sub 35}In{sub 15-x}Si{sub x} (x = 1.0, 3.0, 4.0) Heusler alloys are studied at T = 80-320 K. The martensitic transformation in these alloys occurs at T = 220-280 K from the high-temperature ferromagnetic austenite phase into the low-temperature martensite phase having a substantially lower magnetization. A method is proposed to determine the normal and anomalous Hall effect coefficients in the presence of magnetoresistance and a possible magnetization dependence of these coefficients. The resistivity of the alloys increases jumpwise during the martensitic transformation, reaches 150-200 {mu}{Omega} cm, and is almost temperature-independent. The normal Hall effect coefficient is negative, is higher than that of nickel by an order of magnitude at T = 80 K, decreases monotonically with increasing temperature, approaches zero in austenite, and does not undergo sharp changes in the vicinity of the martensitic transformation. At x = 3, a normal Hall effect nonlinear in magnetization is detected in the immediate vicinity of the martensitic transformation. The temperature dependences of the anomalous Hall effect coefficient in both martensite and austenite and, especially, in the vicinity of the martensitic transformation cannot be described in terms of the skew scattering, the side jump, and the Karplus-Lutinger mechanisms from the anomalous Hall effect theory. The possible causes of this behavior of the magnetotransport properties in Heusler alloys are discussed.

• OSTI ID: 22069270
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 115, Issue 5; Other Information: Copyright (c) 2012 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AUSTENITE
FERROMAGNETIC MATERIALS
FERROMAGNETISM
HALL EFFECT
HEUSLER ALLOYS
INDIUM ALLOYS
MAGNETIZATION
MAGNETORESISTANCE
MANGANESE ALLOYS
MARTENSITE
NICKEL ALLOYS
NONLINEAR PROBLEMS
PHASE TRANSFORMATIONS
SILICON ALLOYS
TEMPERATURE DEPENDENCE