Superconductivity, Kondo effect, and observation of self-organized pattern formation in intermetallic NiBi 3 thin films

Bhatia, Ekta and Talapatra, Abhishek and Mohanty, Jyoti Ranjan and Senapati, Kartik (2018) Superconductivity, Kondo effect, and observation of self-organized pattern formation in intermetallic NiBi 3 thin films. Intermetallics, 94. pp. 160-164. ISSN 09669795

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Abstract

The superconducting properties of the intermetallic compound NiBi3 have been studied mostly in bulk crystals. In this report we have studied several aspects of NiBi3 thin films, spontaneously formed at the interface of Ni and Bi multilayers. We have observed superconducting transition around 3.9 K, close to the bulk transition temperature of 4.1 K. Due to the diffusive mechanism of formation of NiBi3, additional phenomena such as magnetic (Nickel) impurity induced Kondo effect and self organized Turing pattern formation also come into picture. From X-ray diffraction and Magneto-resistance measurements we have established the presence of atomic Ni impurities in the films. Kondo minima were found to scale with varied concentration of Ni impurities in a series of Ni-Bi multilayer films (with fixed Ni thickness and varied Bi thickness). Similarly, saturation magnetization and superconducting transition temperature were also found to follow the concentration of Ni impurities. In addition, we have also observed signatures of Turing patterns, from magnetic force microscopy, naturally formed with time without any external heat treatment.

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IITH Creators:
IITH CreatorsORCiD
Mohanty, Jyoti RanjanUNSPECIFIED
Item Type: Article
Uncontrolled Keywords: Reaction diffusion, Superconductivity, Intermetallic compound
Subjects: Physics
Divisions: Department of Physics
Depositing User: Team Library
Date Deposited: 16 Jan 2018 10:55
Last Modified: 16 Jan 2018 10:55
URI: http://raiith.iith.ac.in/id/eprint/3725
Publisher URL: http://doi.org/10.1016/j.intermet.2018.01.005
OA policy: http://www.sherpa.ac.uk/romeo/issn/0966-9795/
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