Upper critical field and heat capacity in the reentrant superconducting system (Lu1-xErx)RuB2

R. N. Shelton, Herng-Er Horng

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Low-temperature heat capacity, upper-critical-field measurements, and ac magnetic susceptibility are utilized to study the interaction between superconductivity and magnetic order in the orthorhombic compounds (Lu1-xErx)RuB2. Reentrant superconductivity is observed in a concentration range just below a critical value (xcr 0.5), where the superconducting and magnetic phase boundaries meet. For samples with concentrations greater than xcr, two magnetic transitions are observed, opening the possibility of complex magnetic states. The strength of the effective exchange field, Hex, is derived from the conduction-electron rare-earth spin-exchange interaction. Superconductivity is quenched and reentrance occurs when Hex becomes comparable to the Pauli paramagnetic limiting field. Heat-capacity data for LuRuB2 yield a relatively high Debye temperature of 487 K and an electronic specific-heat coefficient of 7.05 mJ/mol K2.

Original languageEnglish
Pages (from-to)1671-1679
Number of pages9
JournalPhysical Review B
Volume33
Issue number3
DOIs
Publication statusPublished - 1986 Jan 1

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Superconductivity
Specific heat
specific heat
superconductivity
Debye temperature
Exchange interactions
Phase boundaries
Magnetic susceptibility
Rare earths
spin exchange
conduction electrons
rare earth elements
Electrons
interactions
magnetic permeability
coefficients
electronics
Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Upper critical field and heat capacity in the reentrant superconducting system (Lu1-xErx)RuB2. / Shelton, R. N.; Horng, Herng-Er.

In: Physical Review B, Vol. 33, No. 3, 01.01.1986, p. 1671-1679.

Research output: Contribution to journalArticle

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