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Heat capacity of the heavy fermion superconductor CeIrIn5 under hydrostatic pressure

MPG-Autoren
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Borth,  R.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Lengyel,  E.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Sparn,  G.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Steglich,  F.
Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zitation

Borth, R., Lengyel, E., Pagliuso, P. G., Sarrao, J. L., Sparn, G., Steglich, F., et al. (2002). Heat capacity of the heavy fermion superconductor CeIrIn5 under hydrostatic pressure. Physica B, 312, 136-137. doi:10.1016/S0921-4526(01)01085-7.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0015-3181-4
Zusammenfassung
CeIrIn5 belongs to a new class of heavy fermion (HE) superconductors that crystallize in the tetragonal HoCoGa5- structure. This structure can be regarded as alternating layers of CeIn3 and IrIn2. Bulk CeIn(3)undergoes a transition from an antiferrornagnetic (AFM) state at ambient pressure (T-N = 10 K) to a superconductina state (T-c = 0.15 K) at a critical pressure p(c) = 2.8 GPa at which long range magnetic order vanishes. It is. therefore, regarded as a possible candidate for magnetically mediated superconductivity (SC). We report on measurements of the heat capacity of CeIrIn5 at hydrostatic pressure pless than or equal to1.6 GPa. With increasing pressure, T-c increases almost linearly up to the maximum pressure applied, while the effective mass of the quasiparticles m(eff) decreases as indicated by the ratio C/T (T = 1 K). This may be interpreted as the stabilization of the superconducting state by the increase of the characteristic spinfluctuation temperature T-SF (T-SF:infinityk(p)(2)/c m(eff)). (C) 2002 Elsevier Science B.V. All rights reserved.