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  Heat capacity of the heavy fermion superconductor CeIrIn5 under hydrostatic pressure

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.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-3181-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-F708-1
Genre: Journal Article

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 Creators:
Borth, R.1, Author              
Lengyel, E.1, Author              
Pagliuso, P. G., Author
Sarrao, J. L., Author
Sparn, G.2, Author              
Steglich, F.3, Author              
Thompson, J. D., Author
Affiliations:
1Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
2Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
3Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863467              

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Free keywords: heavy fermion superconductor; heat capacity; hydrostatic pressure
 Abstract: 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.

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Language(s): eng - English
 Dates: 2002-03
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 16440
ISI: 000175871000049
DOI: 10.1016/S0921-4526(01)01085-7
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Title: Physica B
  Alternative Title : Physica B
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 312 Sequence Number: - Start / End Page: 136 - 137 Identifier: ISSN: 0921-4526