Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102278
Title: Pressure dependence of upper critical fields in FeSe single crystals
Authors: Kang, J. -H.
Jung, S. -G.
Lee, S.
Park, E.
Lin, J. -Y.
Chareev, D. A.
Vasiliev, A. N.
Park, T.
Issue Date: 2016
Publisher: Institute of Physics Publishing
Citation: Pressure dependence of upper critical fields in FeSe single crystals / J. -H. Kang, S. -G. Jung, S. Lee, et al. — DOI 10.1088/0953-2048/29/3/035007 // Superconductor Science and Technology. — 2016. — Vol. 29. — Iss. 3. — 035007.
Abstract: We investigate the pressure dependence of the upper critical fields (μ 0 H c2) for FeSe single crystals with pressure up to 2.57 GPa. The superconducting (SC) properties show a disparate behavior across a critical pressure where the pressure-induced antiferromagnetic phase coexists with superconductivity. The magnetoresistance for H//ab and H//c is very different: for H//c, magnetic field induces and enhances a hump in the resistivity close to the T c for pressures higher than 1.2 GPa, while it is absent for H//ab. Since the measured μ 0 H c2 for FeSe samples is smaller than the orbital limited upper critical field estimated by the Werthamer, Helfand and Hohenberg model, the Maki parameter (α) related to Pauli spin-paramagnetic effects is additionally considered to describe the temperature dependence of μ 0 H c2(T). Interestingly, the α value is hardly affected by pressure for H//ab, while it strongly increases with pressure for H//c. The pressure evolution of the μ 0 H c2(0) for the FeSe single crystals is found to be almost similar to that of T c(P), suggesting that the pressure-induced magnetic order adversely affects the upper critical fields as well as the SC transition temperature. © 2016 IOP Publishing Ltd.
Keywords: FESE
MAKI PARAMETER
PRESSURE
UPPER CRITICAL FIELD
ENHANCED MAGNETORESISTANCE
PRESSURE
TEMPERATURE DISTRIBUTION
ANTIFERROMAGNETIC PHASE
FESE
MAKI PARAMETER
PARAMAGNETIC EFFECT
PRESSURE DEPENDENCE
PRESSURE-INDUCED MAGNETIC ORDER
TEMPERATURE DEPENDENCE
UPPER CRITICAL FIELDS
SINGLE CRYSTALS
URI: http://hdl.handle.net/10995/102278
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 84960172257
PURE ID: 703467
c9dd2ab1-8cb0-4707-9e38-3e99711c53db
ISSN: 9532048
DOI: 10.1088/0953-2048/29/3/035007
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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