Temperature and field dependence of the energy gap of MgB2/Pb planar junctions

Mohamed H. Badr; Mario Freamat; Yuri Sushko; K. W. Ng

Temperature and field dependence of the energy gap of MgB₂/Pb planar junctions

Mohamed H. Badr, Mario Freamat, Yuri Sushko, K. W. Ng

Physics And Astronomy

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

We have constructed MgB₂/Pb planar junctions for both temperature and field dependence studies. Our results show that the small gap is a true bulk property of MgB₂ superconductor, not due to surface effects. The temperature dependence of the energy gap manifests a nearly BCS-like behavior. Analysis of the effect of magnetic field on junctions suggests that the energy gap of MgB₂ depends nonlinearly on the magnetic field. Moreover, MgB₂ has an upper critical field of 15 T, in agreement with some reported H_c2 from transport measurements.

Original language	English
Article number	184516
Pages (from-to)	1845161-1845164
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	65
Issue number	18
State	Published - May 1 2002

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Cite this

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abstract = "We have constructed MgB2/Pb planar junctions for both temperature and field dependence studies. Our results show that the small gap is a true bulk property of MgB2 superconductor, not due to surface effects. The temperature dependence of the energy gap manifests a nearly BCS-like behavior. Analysis of the effect of magnetic field on junctions suggests that the energy gap of MgB2 depends nonlinearly on the magnetic field. Moreover, MgB2 has an upper critical field of 15 T, in agreement with some reported Hc2 from transport measurements.",

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AU - Badr, Mohamed H.

AU - Freamat, Mario

AU - Sushko, Yuri

AU - Ng, K. W.

PY - 2002/5/1

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N2 - We have constructed MgB2/Pb planar junctions for both temperature and field dependence studies. Our results show that the small gap is a true bulk property of MgB2 superconductor, not due to surface effects. The temperature dependence of the energy gap manifests a nearly BCS-like behavior. Analysis of the effect of magnetic field on junctions suggests that the energy gap of MgB2 depends nonlinearly on the magnetic field. Moreover, MgB2 has an upper critical field of 15 T, in agreement with some reported Hc2 from transport measurements.

AB - We have constructed MgB2/Pb planar junctions for both temperature and field dependence studies. Our results show that the small gap is a true bulk property of MgB2 superconductor, not due to surface effects. The temperature dependence of the energy gap manifests a nearly BCS-like behavior. Analysis of the effect of magnetic field on junctions suggests that the energy gap of MgB2 depends nonlinearly on the magnetic field. Moreover, MgB2 has an upper critical field of 15 T, in agreement with some reported Hc2 from transport measurements.

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M1 - 184516

ER -

Temperature and field dependence of the energy gap of MgB₂/Pb planar junctions

Abstract

ASJC Scopus subject areas

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