Heat capacity of the pressure-induced superconductivity in itinerant ferromagnet UGe2

N. Tateiwa; T. C. Kobayashi; K. Amaya; Y. Haga; R. Settai; Y. Onuki

doi:10.1016/S0921-4526(01)01076-6

Heat capacity of the pressure-induced superconductivity in itinerant ferromagnet UGe₂

N. Tateiwa, T. C. Kobayashi, K. Amaya, Y. Haga, R. Settai, Y. Onuki

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

8 Citations (Scopus)

Abstract

Recently, co-existence of the ferromagnetism and superconductivity was reported in the high-pressure region (1.0-1.6 GPa) in UGe₂. We performed the heat capacity measurement on UGe₂ under high pressure. At 1.15 GPa, we found a peak corresponding to the superconducting transition. The superconducting temperature T_SC and ΔC/(γT_SC) are 0.6 K and 0.25, respectively. The superconducting transition was also confirmed by the appearance of the Meissner effect in the AC susceptibility. From these results, we confirm a bulk nature of the superconductivity in UGe₂. The value of C/T (∼95 mJ/molK²) just above T_SC at 1.15 GPa is as much as 3 times larger than that at ambient pressure, which indicates a large mass enhancement of quasiparticles under high pressure.

Original language	English
Pages (from-to)	109-111
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	312-313
DOIs	https://doi.org/10.1016/S0921-4526(01)01076-6
Publication status	Published - Mar 2002
Externally published	Yes
Event	International Conference on Strongly Correlated Electrons - Ann Arbor, MI, United States Duration: Aug 6 2002 → Aug 6 2002

Keywords

Ferromagnetism
Superconductivity
UGe

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4526(01)01076-6

Cite this

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title = "Heat capacity of the pressure-induced superconductivity in itinerant ferromagnet UGe2",

abstract = "Recently, co-existence of the ferromagnetism and superconductivity was reported in the high-pressure region (1.0-1.6 GPa) in UGe2. We performed the heat capacity measurement on UGe2 under high pressure. At 1.15 GPa, we found a peak corresponding to the superconducting transition. The superconducting temperature TSC and ΔC/(γTSC) are 0.6 K and 0.25, respectively. The superconducting transition was also confirmed by the appearance of the Meissner effect in the AC susceptibility. From these results, we confirm a bulk nature of the superconductivity in UGe2. The value of C/T (∼95 mJ/molK2) just above TSC at 1.15 GPa is as much as 3 times larger than that at ambient pressure, which indicates a large mass enhancement of quasiparticles under high pressure.",

keywords = "Ferromagnetism, Superconductivity, UGe",

author = "N. Tateiwa and Kobayashi, {T. C.} and K. Amaya and Y. Haga and R. Settai and Y. Onuki",

note = "Funding Information: This work was financially supported by the Grant-in Aid for COE Research (No. 10CE2004) of the Ministry of Education, Culture, Sports, Science and Technology, and by CREST, Japan Science and Technology Corporation.; 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)01076-6",

language = "English",

volume = "312-313",

pages = "109--111",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

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TY - JOUR

T1 - Heat capacity of the pressure-induced superconductivity in itinerant ferromagnet UGe2

AU - Tateiwa, N.

AU - Kobayashi, T. C.

AU - Amaya, K.

AU - Haga, Y.

AU - Settai, R.

AU - Onuki, Y.

N1 - Funding Information: This work was financially supported by the Grant-in Aid for COE Research (No. 10CE2004) of the Ministry of Education, Culture, Sports, Science and Technology, and by CREST, Japan Science and Technology Corporation.

PY - 2002/3

Y1 - 2002/3

N2 - Recently, co-existence of the ferromagnetism and superconductivity was reported in the high-pressure region (1.0-1.6 GPa) in UGe2. We performed the heat capacity measurement on UGe2 under high pressure. At 1.15 GPa, we found a peak corresponding to the superconducting transition. The superconducting temperature TSC and ΔC/(γTSC) are 0.6 K and 0.25, respectively. The superconducting transition was also confirmed by the appearance of the Meissner effect in the AC susceptibility. From these results, we confirm a bulk nature of the superconductivity in UGe2. The value of C/T (∼95 mJ/molK2) just above TSC at 1.15 GPa is as much as 3 times larger than that at ambient pressure, which indicates a large mass enhancement of quasiparticles under high pressure.

AB - Recently, co-existence of the ferromagnetism and superconductivity was reported in the high-pressure region (1.0-1.6 GPa) in UGe2. We performed the heat capacity measurement on UGe2 under high pressure. At 1.15 GPa, we found a peak corresponding to the superconducting transition. The superconducting temperature TSC and ΔC/(γTSC) are 0.6 K and 0.25, respectively. The superconducting transition was also confirmed by the appearance of the Meissner effect in the AC susceptibility. From these results, we confirm a bulk nature of the superconductivity in UGe2. The value of C/T (∼95 mJ/molK2) just above TSC at 1.15 GPa is as much as 3 times larger than that at ambient pressure, which indicates a large mass enhancement of quasiparticles under high pressure.

KW - Ferromagnetism

KW - Superconductivity

KW - UGe

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DO - 10.1016/S0921-4526(01)01076-6

M3 - Conference article

AN - SCOPUS:0036503849

SN - 0921-4526

VL - 312-313

SP - 109

EP - 111

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 -