Low temperature specific heat of polycrystalline UGe2 at high pressure

R. Vollmer; C. Pfleiderer; H. V. Löhneysen; E. D. Bauer; M. B. Maple

doi:10.1016/S0921-4526(01)01078-X

Low temperature specific heat of polycrystalline UGe₂ at high pressure

R. Vollmer, C. Pfleiderer, H. V. Löhneysen, E. D. Bauer, M. B. Maple

Research output: Contribution to journal › Conference article › peer-review

9 Scopus citations

Abstract

In UGe₂, superconductivity in coexistence with ferromagnetism is observed in single crystal (Nature 406 (2000) 587; Phys. Rev. B 63 (2001) 144519) and polycrystalline samples (J. Phys. Condens. Matter 13 (2001) L759) just below the pressure p_c ≈ 16 kbar for which the Curie temperature T_C drops to zero. We present measurements of the specific heat C in the range 0.1-2.5 K on polycrystalline samples up to 14.7 kbar. The linear coefficient of the specific heat, γ = C/T, increases as a function of pressure and is the highest in the p-range where superconductivity is observed. In the superconducting state the AC magnetic susceptibility exhibits strong diamagnetic shielding. The specific heat displays an anomaly that is indicative of a bulk superconducting transition of order 15-20% by volume. The observed properties reflect an intricate interplay of the coexistence of ferromagnetism and superconductivity in UGe₂.

Original language	English
Pages (from-to)	112-114
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	312-313
DOIs	https://doi.org/10.1016/S0921-4526(01)01078-X
State	Published - Mar 2002
Externally published	Yes
Event	International Conference on Strongly Correlated Electrons - Ann Arbor, MI, United States Duration: 6 Aug 2002 → 6 Aug 2002

Keywords

Ferromagnetism
Specific heat
Superconductivity
UGe

Access to Document

10.1016/S0921-4526(01)01078-X

Cite this

@article{ef1eb3e4a5c04498a06ff1bd7ab58ed0,

title = "Low temperature specific heat of polycrystalline UGe2 at high pressure",

abstract = "In UGe2, superconductivity in coexistence with ferromagnetism is observed in single crystal (Nature 406 (2000) 587; Phys. Rev. B 63 (2001) 144519) and polycrystalline samples (J. Phys. Condens. Matter 13 (2001) L759) just below the pressure pc ≈ 16 kbar for which the Curie temperature TC drops to zero. We present measurements of the specific heat C in the range 0.1-2.5 K on polycrystalline samples up to 14.7 kbar. The linear coefficient of the specific heat, γ = C/T, increases as a function of pressure and is the highest in the p-range where superconductivity is observed. In the superconducting state the AC magnetic susceptibility exhibits strong diamagnetic shielding. The specific heat displays an anomaly that is indicative of a bulk superconducting transition of order 15-20% by volume. The observed properties reflect an intricate interplay of the coexistence of ferromagnetism and superconductivity in UGe2.",

keywords = "Ferromagnetism, Specific heat, Superconductivity, UGe",

author = "R. Vollmer and C. Pfleiderer and L{\"o}hneysen, {H. V.} and Bauer, {E. D.} and Maple, {M. B.}",

note = "Funding Information: M.B.M. acknowledges the Alexander von Humboldt Foundation for a Senior Scientist Research Award. Research in Karlsruhe was supported by the Deutsche Forschungsgemeinschaft and the Ferlin Program of the European Science Foundation. Research at UCSD was supported by the US Department of Energy.; International Conference on Strongly Correlated Electrons ; Conference date: 06-08-2002 Through 06-08-2002",

year = "2002",

month = mar,

doi = "10.1016/S0921-4526(01)01078-X",

language = "English",

volume = "312-313",

pages = "112--114",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Low temperature specific heat of polycrystalline UGe2 at high pressure

AU - Vollmer, R.

AU - Pfleiderer, C.

AU - Löhneysen, H. V.

AU - Bauer, E. D.

AU - Maple, M. B.

N1 - Funding Information: M.B.M. acknowledges the Alexander von Humboldt Foundation for a Senior Scientist Research Award. Research in Karlsruhe was supported by the Deutsche Forschungsgemeinschaft and the Ferlin Program of the European Science Foundation. Research at UCSD was supported by the US Department of Energy.

PY - 2002/3

Y1 - 2002/3

N2 - In UGe2, superconductivity in coexistence with ferromagnetism is observed in single crystal (Nature 406 (2000) 587; Phys. Rev. B 63 (2001) 144519) and polycrystalline samples (J. Phys. Condens. Matter 13 (2001) L759) just below the pressure pc ≈ 16 kbar for which the Curie temperature TC drops to zero. We present measurements of the specific heat C in the range 0.1-2.5 K on polycrystalline samples up to 14.7 kbar. The linear coefficient of the specific heat, γ = C/T, increases as a function of pressure and is the highest in the p-range where superconductivity is observed. In the superconducting state the AC magnetic susceptibility exhibits strong diamagnetic shielding. The specific heat displays an anomaly that is indicative of a bulk superconducting transition of order 15-20% by volume. The observed properties reflect an intricate interplay of the coexistence of ferromagnetism and superconductivity in UGe2.

AB - In UGe2, superconductivity in coexistence with ferromagnetism is observed in single crystal (Nature 406 (2000) 587; Phys. Rev. B 63 (2001) 144519) and polycrystalline samples (J. Phys. Condens. Matter 13 (2001) L759) just below the pressure pc ≈ 16 kbar for which the Curie temperature TC drops to zero. We present measurements of the specific heat C in the range 0.1-2.5 K on polycrystalline samples up to 14.7 kbar. The linear coefficient of the specific heat, γ = C/T, increases as a function of pressure and is the highest in the p-range where superconductivity is observed. In the superconducting state the AC magnetic susceptibility exhibits strong diamagnetic shielding. The specific heat displays an anomaly that is indicative of a bulk superconducting transition of order 15-20% by volume. The observed properties reflect an intricate interplay of the coexistence of ferromagnetism and superconductivity in UGe2.

KW - Ferromagnetism

KW - Specific heat

KW - Superconductivity

KW - UGe

UR - http://www.scopus.com/inward/record.url?scp=0036504249&partnerID=8YFLogxK

U2 - 10.1016/S0921-4526(01)01078-X

DO - 10.1016/S0921-4526(01)01078-X

M3 - Conference article

AN - SCOPUS:0036504249

SN - 0921-4526

VL - 312-313

SP - 112

EP - 114

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

T2 - International Conference on Strongly Correlated Electrons

Y2 - 6 August 2002 through 6 August 2002

ER -

Low temperature specific heat of polycrystalline UGe₂ at high pressure

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this