Evidence of upper-critical-field enhancement in K3C60 powders

G. S. Boebinger; T. T .M. Palstra; A. Passner; M. J. Rosseinsky; D. W. Murphy; I. I. Mazin

doi:10.1103/PhysRevB.46.5876

Evidence of upper-critical-field enhancement in K3C60 powders

G. S. Boebinger^*, T. T .M. Palstra, A. Passner, M. J. Rosseinsky, D. W. Murphy, I. I. Mazin

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

54 Citations (Scopus)

17 Downloads (Pure)

Abstract

ac susceptibility measurements of superconducting K3C60 powders in magnetic fields to 30 T yield a roughly linear Hc2(T) curve extending up to the highest experimental fields. Samples prepared by two different methods give -dHc2/dT=2.14±0.08 T/K, with Tc=18.7 K. The observed Hc2 at low temperatures exceeds the Hc2(T) curve from the standard theory by Werthamer-Helfand-Hohenberg. We discuss the role of flux motion and evidence for enhancement of Hc2 by intrinsic mechanisms such as strong coupling, Fermi surface anisotropy, and/or granularity of the samples.

Original language	English
Pages (from-to)	5876-5879
Number of pages	4
Journal	Physical Review B (Condensed Matter)
Volume	46
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.46.5876
Publication status	Published - 1 Jan 1992
Externally published	Yes

Access to Document

10.1103/PhysRevB.46.5876

PhysRevB.46.5876Final published version, 232 KB

Cite this

@article{3b8f16abaf014a0e9d462c89019a916a,

title = "Evidence of upper-critical-field enhancement in K3C60 powders",

abstract = "ac susceptibility measurements of superconducting K3C60 powders in magnetic fields to 30 T yield a roughly linear Hc2(T) curve extending up to the highest experimental fields. Samples prepared by two different methods give -dHc2/dT=2.14±0.08 T/K, with Tc=18.7 K. The observed Hc2 at low temperatures exceeds the Hc2(T) curve from the standard theory by Werthamer-Helfand-Hohenberg. We discuss the role of flux motion and evidence for enhancement of Hc2 by intrinsic mechanisms such as strong coupling, Fermi surface anisotropy, and/or granularity of the samples.",

author = "Boebinger, {G. S.} and Palstra, {T. T .M.} and A. Passner and Rosseinsky, {M. J.} and Murphy, {D. W.} and Mazin, {I. I.}",

year = "1992",

month = jan,

day = "1",

doi = "10.1103/PhysRevB.46.5876",

language = "English",

volume = "46",

pages = "5876--5879",

journal = "Physical Review B (Condensed Matter)",

issn = "0163-1829",

publisher = "American Physical Society",

number = "9",

}

TY - JOUR

T1 - Evidence of upper-critical-field enhancement in K3C60 powders

AU - Boebinger, G. S.

AU - Palstra, T. T .M.

AU - Passner, A.

AU - Rosseinsky, M. J.

AU - Murphy, D. W.

AU - Mazin, I. I.

PY - 1992/1/1

Y1 - 1992/1/1

N2 - ac susceptibility measurements of superconducting K3C60 powders in magnetic fields to 30 T yield a roughly linear Hc2(T) curve extending up to the highest experimental fields. Samples prepared by two different methods give -dHc2/dT=2.14±0.08 T/K, with Tc=18.7 K. The observed Hc2 at low temperatures exceeds the Hc2(T) curve from the standard theory by Werthamer-Helfand-Hohenberg. We discuss the role of flux motion and evidence for enhancement of Hc2 by intrinsic mechanisms such as strong coupling, Fermi surface anisotropy, and/or granularity of the samples.

AB - ac susceptibility measurements of superconducting K3C60 powders in magnetic fields to 30 T yield a roughly linear Hc2(T) curve extending up to the highest experimental fields. Samples prepared by two different methods give -dHc2/dT=2.14±0.08 T/K, with Tc=18.7 K. The observed Hc2 at low temperatures exceeds the Hc2(T) curve from the standard theory by Werthamer-Helfand-Hohenberg. We discuss the role of flux motion and evidence for enhancement of Hc2 by intrinsic mechanisms such as strong coupling, Fermi surface anisotropy, and/or granularity of the samples.

UR - http://www.scopus.com/inward/record.url?scp=0003182446&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.46.5876

DO - 10.1103/PhysRevB.46.5876

M3 - Article

AN - SCOPUS:0003182446

SN - 0163-1829

VL - 46

SP - 5876

EP - 5879

JO - Physical Review B (Condensed Matter)

JF - Physical Review B (Condensed Matter)

IS - 9

ER -

Evidence of upper-critical-field enhancement in K3C60 powders

Abstract

Access to Document

Other files and links

Fingerprint

Cite this