The pressure dependence of the superconducting transition temperature of LaT4P12(T = Fe, Ru, Os)

L. E. DeLong; G. P. Meisner

doi:10.1016/0038-1098(85)90108-5

The pressure dependence of the superconducting transition temperature of LaT₄P₁₂(T = Fe, Ru, Os)

L. E. DeLong, G. P. Meisner

Physics And Astronomy

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

70 Scopus citations

Abstract

The superconducting transition temperature, T_c, of the LaT₄P₁₂ compounds with T = Fe, Ru, or Os has been measured under hydrostatic pressure P up to 1.8 GPa. The T = Fe compound exhibits a substantial increase of T_c from T_c (P = 0) = 4.1 K at a rate (dT_c/dP)_P=0= +7.2 x 10^-1 K/GPa. In contrast, the Ru and Os compounds exhibit only weak decreases of T_c from T_c (P = 0) = 7.2 K and 1.8 K with (dT_c/dP)_P=0= -1.6 x 10^-1 K/GPa and -9.5 x 10^-2 K/GPa, respectively. An analysis of this strikingly divergent behavior of T_c(P) in terms of the structural characteristics of the RT₄X₁₂ class of compounds where R = rare earth element, T = Fe, Ru, or Os, and X = P, As, or Sb suggests that T_c(P) for these materials consists of two competing contributions: a depression of T_c due to the compression of the lattice (i.e., decrease in volume), and an enhancement of T_c due to the effect of pressure on La itself.

Original language	English
Pages (from-to)	119-123
Number of pages	5
Journal	Solid State Communications
Volume	53
Issue number	2
DOIs	https://doi.org/10.1016/0038-1098(85)90108-5
State	Published - Jan 1985

Bibliographical note

Funding Information:
Acknowledgments - We thank Sally Fisher for assistance in performing the pressure measurements. Informative discussions with Drs. R. C. Albers, A. M. Boring, A. L. Giorgi, and Professor D. K. Wohlleben. The work at LANL was performed under the auspices of the U.S. Department of Energy.

Funding

Acknowledgments - We thank Sally Fisher for assistance in performing the pressure measurements. Informative discussions with Drs. R. C. Albers, A. M. Boring, A. L. Giorgi, and Professor D. K. Wohlleben. The work at LANL was performed under the auspices of the U.S. Department of Energy.

Funders	Funder number
Michigan State University-U.S. Department of Energy (MSU-DOE) Plant Research Laboratory
Los Alamos National Laboratory

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

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10.1016/0038-1098(85)90108-5

Cite this

@article{011f32b69e164dcd85ad2587a188f5a8,

title = "The pressure dependence of the superconducting transition temperature of LaT4P12(T = Fe, Ru, Os)",

abstract = "The superconducting transition temperature, Tc, of the LaT4P12 compounds with T = Fe, Ru, or Os has been measured under hydrostatic pressure P up to 1.8 GPa. The T = Fe compound exhibits a substantial increase of Tc from Tc (P = 0) = 4.1 K at a rate (dTc/dP)P=0= +7.2 x 10-1 K/GPa. In contrast, the Ru and Os compounds exhibit only weak decreases of Tc from Tc (P = 0) = 7.2 K and 1.8 K with (dTc/dP)P=0= -1.6 x 10-1 K/GPa and -9.5 x 10-2 K/GPa, respectively. An analysis of this strikingly divergent behavior of Tc(P) in terms of the structural characteristics of the RT4X12 class of compounds where R = rare earth element, T = Fe, Ru, or Os, and X = P, As, or Sb suggests that Tc(P) for these materials consists of two competing contributions: a depression of Tc due to the compression of the lattice (i.e., decrease in volume), and an enhancement of Tc due to the effect of pressure on La itself.",

author = "DeLong, \{L. E.\} and Meisner, \{G. P.\}",

note = "Funding Information: Acknowledgments - We thank Sally Fisher for assistance in performing the pressure measurements. Informative discussions with Drs. R. C. Albers, A. M. Boring, A. L. Giorgi, and Professor D. K. Wohlleben. The work at LANL was performed under the auspices of the U.S. Department of Energy.",

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N2 - The superconducting transition temperature, Tc, of the LaT4P12 compounds with T = Fe, Ru, or Os has been measured under hydrostatic pressure P up to 1.8 GPa. The T = Fe compound exhibits a substantial increase of Tc from Tc (P = 0) = 4.1 K at a rate (dTc/dP)P=0= +7.2 x 10-1 K/GPa. In contrast, the Ru and Os compounds exhibit only weak decreases of Tc from Tc (P = 0) = 7.2 K and 1.8 K with (dTc/dP)P=0= -1.6 x 10-1 K/GPa and -9.5 x 10-2 K/GPa, respectively. An analysis of this strikingly divergent behavior of Tc(P) in terms of the structural characteristics of the RT4X12 class of compounds where R = rare earth element, T = Fe, Ru, or Os, and X = P, As, or Sb suggests that Tc(P) for these materials consists of two competing contributions: a depression of Tc due to the compression of the lattice (i.e., decrease in volume), and an enhancement of Tc due to the effect of pressure on La itself.

AB - The superconducting transition temperature, Tc, of the LaT4P12 compounds with T = Fe, Ru, or Os has been measured under hydrostatic pressure P up to 1.8 GPa. The T = Fe compound exhibits a substantial increase of Tc from Tc (P = 0) = 4.1 K at a rate (dTc/dP)P=0= +7.2 x 10-1 K/GPa. In contrast, the Ru and Os compounds exhibit only weak decreases of Tc from Tc (P = 0) = 7.2 K and 1.8 K with (dTc/dP)P=0= -1.6 x 10-1 K/GPa and -9.5 x 10-2 K/GPa, respectively. An analysis of this strikingly divergent behavior of Tc(P) in terms of the structural characteristics of the RT4X12 class of compounds where R = rare earth element, T = Fe, Ru, or Os, and X = P, As, or Sb suggests that Tc(P) for these materials consists of two competing contributions: a depression of Tc due to the compression of the lattice (i.e., decrease in volume), and an enhancement of Tc due to the effect of pressure on La itself.

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