Magnetic penetration depth of MgB2
Publication type: Journal Article
Publication date: 2003-03-01
scimago Q3
wos Q4
SJR: 0.313
CiteScore: 2.4
Impact factor: 1.0
ISSN: 09214534, 18732143
Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering
Energy Engineering and Power Technology
Abstract
The low temperature behaviour of the magnetic penetration depth λ(T) provides a useful probe of the low lying excitations in superconductors and hence of the anisotropy of the superconducting energy gap. In this paper, we will present measurements of the penetration depth in the Meissner state of both single crystal and polycrystalline samples of MgB2, using a very low field RF technique. λ(T) shows a clear exponential temperature dependence T/Tc≲0.2, strongly indicating that this material is fully gapped. Detailed fits to the superfluid density over the full temperature range of our measurements (1>T/Tc>0.04) gives strong support for the existence of two distinct superconducting gaps, Δs=29 K and Δb=75 K, in agreement with recent theoretical predictions and other probes.
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Carrington A., MANZANO F. Magnetic penetration depth of MgB2 // Physica C: Superconductivity and its Applications. 2003. Vol. 385. No. 1-2. pp. 205-214.
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Carrington A., MANZANO F. Magnetic penetration depth of MgB2 // Physica C: Superconductivity and its Applications. 2003. Vol. 385. No. 1-2. pp. 205-214.
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TY - JOUR
DO - 10.1016/S0921-4534(02)02319-5
UR - https://doi.org/10.1016/S0921-4534(02)02319-5
TI - Magnetic penetration depth of MgB2
T2 - Physica C: Superconductivity and its Applications
AU - Carrington, A.
AU - MANZANO, F.
PY - 2003
DA - 2003/03/01
PB - Elsevier
SP - 205-214
IS - 1-2
VL - 385
SN - 0921-4534
SN - 1873-2143
ER -
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@article{2003_Carrington,
author = {A. Carrington and F. MANZANO},
title = {Magnetic penetration depth of MgB2},
journal = {Physica C: Superconductivity and its Applications},
year = {2003},
volume = {385},
publisher = {Elsevier},
month = {mar},
url = {https://doi.org/10.1016/S0921-4534(02)02319-5},
number = {1-2},
pages = {205--214},
doi = {10.1016/S0921-4534(02)02319-5}
}
Cite this
MLA
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Carrington, A., and F. MANZANO. “Magnetic penetration depth of MgB2.” Physica C: Superconductivity and its Applications, vol. 385, no. 1-2, Mar. 2003, pp. 205-214. https://doi.org/10.1016/S0921-4534(02)02319-5.