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Title: Superconductivity in the ternary germanide La{sub 3}Pd{sub 4}Ge{sub 4}

Abstract

The ternary germanide La{sub 3}Pd{sub 4}Ge{sub 4} has been prepared by arc melting. This compound takes a body-centered lattice with an orthorhombic unit cell with the lattice parameters of a=4.2200(3) A, b=4.3850(3) A, and c=25.003(2) A. The crystal structure of La{sub 3}Pd{sub 4}Ge{sub 4} is U{sub 3}Ni{sub 4}Si{sub 4}-type with the space group of Immm, consisting of the combination of structural units of AlB{sub 2}-type and BaAl{sub 4}-type layers. This compound is a type-II superconductor with a critical temperature (T{sub c}) of 2.75 K. The lower critical field H{sub c1}(0) is estimated to be 54 Oe. The upper critical field H{sub c2}(0) estimated by linear extrapolation of the H{sub c2}(T) curves is about 4.0 kOe, whereas the Werthamer-Hefland-Hohemberg theory gives H{sub c2}(0){sup WHH}=3.0 kOe. This is an interesting observation of superconductivity in the compounds with U{sub 3}Ni{sub 4}Si{sub 4}-type structure. The coherence length {xi}(0) of 330 A and the penetration depth {lambda}(0) of 2480 A are derived.

Authors:
; ;  [1];  [2]
  1. Superconducting Materials Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan)
  2. Materials Analysis Station, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)
Publication Date:
OSTI Identifier:
20787751
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics; Journal Volume: 72; Journal Issue: 21; Other Information: DOI: 10.1103/PhysRevB.72.214520; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM BORIDES; COHERENCE LENGTH; CRITICAL FIELD; EXTRAPOLATION; GERMANIUM ALLOYS; LANTHANUM ALLOYS; LATTICE PARAMETERS; LAYERS; MELTING; ORTHORHOMBIC LATTICES; PALLADIUM ALLOYS; PENETRATION DEPTH; SUPERCONDUCTIVITY; TETRAGONAL LATTICES; TRANSITION TEMPERATURE; TYPE-II SUPERCONDUCTORS

Citation Formats

Fujii, H., Mochiku, T., Takeya, H., and Sato, A. Superconductivity in the ternary germanide La{sub 3}Pd{sub 4}Ge{sub 4}. United States: N. p., 2005. Web. doi:10.1103/PHYSREVB.72.2.
Fujii, H., Mochiku, T., Takeya, H., & Sato, A. Superconductivity in the ternary germanide La{sub 3}Pd{sub 4}Ge{sub 4}. United States. doi:10.1103/PHYSREVB.72.2.
Fujii, H., Mochiku, T., Takeya, H., and Sato, A. Thu . "Superconductivity in the ternary germanide La{sub 3}Pd{sub 4}Ge{sub 4}". United States. doi:10.1103/PHYSREVB.72.2.
@article{osti_20787751,
title = {Superconductivity in the ternary germanide La{sub 3}Pd{sub 4}Ge{sub 4}},
author = {Fujii, H. and Mochiku, T. and Takeya, H. and Sato, A.},
abstractNote = {The ternary germanide La{sub 3}Pd{sub 4}Ge{sub 4} has been prepared by arc melting. This compound takes a body-centered lattice with an orthorhombic unit cell with the lattice parameters of a=4.2200(3) A, b=4.3850(3) A, and c=25.003(2) A. The crystal structure of La{sub 3}Pd{sub 4}Ge{sub 4} is U{sub 3}Ni{sub 4}Si{sub 4}-type with the space group of Immm, consisting of the combination of structural units of AlB{sub 2}-type and BaAl{sub 4}-type layers. This compound is a type-II superconductor with a critical temperature (T{sub c}) of 2.75 K. The lower critical field H{sub c1}(0) is estimated to be 54 Oe. The upper critical field H{sub c2}(0) estimated by linear extrapolation of the H{sub c2}(T) curves is about 4.0 kOe, whereas the Werthamer-Hefland-Hohemberg theory gives H{sub c2}(0){sup WHH}=3.0 kOe. This is an interesting observation of superconductivity in the compounds with U{sub 3}Ni{sub 4}Si{sub 4}-type structure. The coherence length {xi}(0) of 330 A and the penetration depth {lambda}(0) of 2480 A are derived.},
doi = {10.1103/PHYSREVB.72.2},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 21,
volume = 72,
place = {United States},
year = {Thu Dec 01 00:00:00 EST 2005},
month = {Thu Dec 01 00:00:00 EST 2005}
}