A1 Journal article (refereed), original research

Drastic violation of the basic correlation between the Hall effect and resistivity in the Heusler alloy Ni 45 Cr 5 Mn 37 In 13


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Publication Details
Authors: Pandey S., Blinov M., Aryal A., Dubenko I., Prudnikov V., Lähderanta E., Granovsky A., Kazachkova N., Stadler S., Ali N.
Publisher: Elsevier
Publication year: 2019
Language: English
Related Journal or Series Information: Journal of Magnetism and Magnetic Materials
Journal name in source: Journal of Magnetism and Magnetic Materials
Volume number: 481
Start page: 25
End page: 28
Number of pages: 4
ISSN: 0304-8853
eISSN: 1873-4766
JUFO-Level of this publication: 1
Open Access: Not an Open Access publication

Abstract

Two metamagnetic Heusler alloys based on Ni45Cr5Mn37In13 with differing Mn concentrations (by 0.2 at. %) were studied using magnetization, resistivity, and Hall resistivity measurements. It is shown that this small variation in composition leads to fundamental changes in magnetic properties. Near the martensitic phase transitions, the anomalous Hall coefficient (RS) was found to increase with temperature while the resistivity (ρ) decreases. Thus, in the case of Ni45Cr5Mn37In13, the general correlation between RS and ρ, considered as applicable for all crystalline and amorphous ferromagnetic alloys, breaks down completely. We explain this behavior in the framework of an s-d model where it is assumed that the resistivity and anomalous Hall effect are determined by different groups of current carriers.


Last updated on 2020-20-03 at 10:03