Resistance and magnetoresistance in platinum nanowire: Implications to Kohler's rule

Roy, A and Akshaya Shiva, V and MA¡tAfi Tempfli, S and MA¡tAfi Tempfli, M and Kiebooms, R and Menon, R (2020) Resistance and magnetoresistance in platinum nanowire: Implications to Kohler's rule. In: Physica B: Condensed Matter, 591 .

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Abstract

The temperature dependence of resistance (1.5�300 K) of electrochemically deposited vertically aligned Platinum nanowires (Pt-NWs) is characterized by using the Bloch-Grüneisen formalism (BG), Fuchs-Sondheimer theory (FS), Mayadas-Shatzkes model (MS) and Debye temperature (θR). The low value of θR ~34 K in Pt-NWs as compared to bulk Pt (θR ~ 242 K) shows significant phonon softening associated with the disorder. Fit to the temperature dependence resistance confirms the contribution of surface scattering and grain-boundary scattering where surface scattering dominates over grain-boundary scattering by a factor of 2. The low-temperature magneto-transport data up to 11 T in Pt-NWs shows deviations from Kohler's rule, especially in the longitudinal direction. This variation in transverse versus longitudinal MR can be used to probe the directional dependence of scattering from disorder in NWs.

Item Type:	Journal Article
Publication:	Physica B: Condensed Matter
Publisher:	ELSEVIER
Additional Information:	The copyright of this article belongs to ELSEVIER
Keywords:	Grain boundaries; Nanowires; Plasma interactions; Platinum; Surface scattering, Directional dependence; Grain boundary scattering; Longitudinal direction; Mayadas-Shatzkes model; Phonon softening; Platinum nanowires; Temperature dependence; Vertically aligned, Temperature distribution
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	12 Aug 2020 10:57
Last Modified:	12 Aug 2020 10:57
URI:	http://eprints.iisc.ac.in/id/eprint/65473

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