Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/6634
Title: Anomalous Hall effect in quarternary Heusler-type Ni₅₀Mn₁₇Fe₈Ga₂₅ melt-spun ribbons
Authors: Zhu, Z
Or, DSW 
Wu, G
Keywords: Austenite
Electron energy loss spectroscopy
Electron scattering
Gyrators
Hall effect
Magnetic field effects
Manganese
Martensite
Melt spinning
Phonons
Issue Date: Jul-2009
Publisher: American Institute of Physics
Source: Applied physics letters, July 2009, v. 95, no. 3, 032503, p.1-3 How to cite?
Journal: Applied physics letters 
Abstract: The anomalous Hall effect (AHE) in quarternary Heusler-type Ni₅₀Mn₁₇Fe₈Ga₂₅ melt-spun ribbons is investigated. Experimental correlation between saturated anomalous Hall resistivity (ρ A MS) and longitudinal resistivity (ρ[sub xx]) is achieved for the low-temperature martensitic phase and the high-temperature austenitic phase as ρA MS ∞ ρxx n=4.2 and ρA MS ∞ ρxx n=2.1, respectively. The unexpectedly large exponent of n=4.2 in the martensitic phase is found to contradict the traditional theory of AHE with n=1-2, but it can be explained by a side-jump model beyond the short-range limit as a result of the intermediate-range spin-dependent electron scattering by relatively large Mn-rich clusters instead. The restoration of the exponent back to a normal value of n=2.1 in the austenitic phase is ascribed to the domination of the electron scattering by phonons, compared to that by the Mn-rich clusters, at elevated temperatures and with phonon softening in the transverse-acoustic TA₂ mode. (See Article file for details of the abstract.)
URI: http://hdl.handle.net/10397/6634
ISSN: 0003-6951
EISSN: 1077-3118
DOI: 10.1063/1.3176479
Rights: Copyright 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Z. Zhu, S. W. Or, & G. Wu, Appl. Phys. Lett. 95, 032503 (2009) http://dx.doi.org/ 10.1063/1.3176479 and may be found at http://scitation.aip.org/content/aip/journal/apl/95/3/10.1063/1.3176479.
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