Singh, Gyanendra and Joshi, P. C. and Hossain, Z. and Budhani, R. C. (2013) Reentrant superconductivity in HoNi5-NbN-HoNi5 nanostructures. EPL (Europhysics Letters), 103 (4). 47013-p1-47013-p6. ISSN 0295-5075

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Abstract

Superconductivity (S) and ferromagnetism (F) are probed through transport and magnetization measurements in nanometer scale HoNi5-NbN5 (F-S) bilayers and HoNi5-NbN-HoNi5 (F-S-F) trilayers. The choice of materials has been made on the basis of their comparable ordering temperatures and strong magnetic anisotropy in HoNi5. We observe the normal state reentrant behavior in resistance vs. temperature plots of the F-S-F structures just below the superconducting transition in the limited range of HoNi5 layer thickness d(HN) (20 nm < d(HN) < 80 nm) when d(NbN) is fixed at similar or equal to 10 nm. The reentrance is quenched by increasing the out-of-plane (H.) magnetic field and transport current where as in-plane (H-parallel to) field of <= 1500 Oe has no effect on the reentrance. The origin of the reentrant behavior seen here in the range 0.74 <= T-Curie/T-C <= 0.92 is attributed to a delicate balance between the magnetic exchange energy and the condensation energy in the interfacial regions of the trilayer.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Institute of Physics.
Subjects:	Physics
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	19 Jun 2020 11:10
Last Modified:	19 Jun 2020 11:10
URI:	http://npl.csircentral.net/id/eprint/3080

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