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Author (up) Pedrazzini, P.; Berisso, M.G.; Caroca-Canales, N.; Deppe, M.; Geibel, C.; Sereni, J.G.
Title Low temperature magnetic phase diagram of the cubic non-Fermi liquid system Celn(3-x)Sn(x) Type Journal Article
Year 2004 Publication The European Physical Journal B – Condensed Matter Abbreviated Journal Eur. Phys. J. B
Volume 38 Issue 3 Pages 445-450
Keywords
Abstract In this paper we report a comprehensive study of the magnetic susceptibility (x), resistivity (p), and specific heat (C-P), down to 0.5 K of the cubic CeIn3-xSnx alloy. The ground state of this system evolves from antiferromagnetic (AF) in CeIn3 (T-N = 10.2 K) to intermediate-valent in CeSn3, and represents the first example of a Ce-lattice cubic non-Fermi liquid (NFL) system where T-N(x) can be traced down to T = 0 over more than a decade of temperature. Our results indicate that the disappearance of the AF state occurs near x(c) approximate to 0.7, although already at x approximate to 0.4 significant modifications of the magnetic ground state are observed. Between these concentrations, clear NFL signatures are observed, such as rho(T) approximate to rho(0) + A T-n (with n < 1.5) and C-P(T) proportional to -T ln(T) dependencies. Within the ordered phase a first order phase transition occurs for 0.25 < x < 0.5. With larger Sn doping, different weak rho(T) dependencies are observed at low temperatures between x = 1 and x = 3 while C-P/T shows only a weak temperature dependence.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1434-6028 ISBN Medium
Area Expedition Conference
Notes ISI:000222309400006 Approved no
Call Number BT @ hernan @ Serial 289
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Author (up) Shalóm, D. E.; Reparáz, S.; Pastoriza, H.
Title Finite Josephson junction arrays with open boundaries in magnetic field: Ground state energy and first critical field Type Journal Article
Year 2004 Publication The European Physical Journal B – Condensed Matter Abbreviated Journal
Volume 40 Issue Pages 409-413
Keywords
Abstract We have investigated the size dependence of the ground state energy as a function of the magnetic field in Josephson junction arrays with open boundaries. We present a simple rings model that reproduces with great confidence the size and field dependence of the energy of the system obtained by numerical simulation of the Hamiltonian. From these results we obtained the size dependence of the first penetration field, where the one-vortex state becomes favorable compared to the zero-vortex state.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ hernan @ shalom04b Serial 44
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