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Title: Superconductivity of yttrium sesquicarbide synthesized at high pressures

Abstract

Superconducting (T/sub c/ from 4.5 to 12.6 /sup 0/K) yttrium sesquicarbide with the bcc structure of the Pu/sub 2/C/sub 3/ type was synthesized at high pressures (30--90 kbar) and high temperatures (1100--1700 /sup 0/C). Superconducting samples were prepared from charges of different compositions and the lattice parameter of the cubic phase varied from 8.190 to 8.250 A. A superconducting phase was also prepared easily under the same conditions from yttrium carbides of unknown structure, which were made by arc melting. The initial parts of the curves representing the critical magnetic fields were determined and these were used to extrapolate the critical magnetic field to 0 /sup 0/K. The maximum critical field was 14 T. Doping of yttrium carbide with some transition metals increased the critical temperature to 15 /sup 0/K and the critical field to 16 T.

Authors:
; ; ;
Publication Date:
Research Org.:
Institute of High-Pressure Physics, Academy of Sciences of the USSR, Akademgorodok, Podolsk District, Moscow Province
OSTI Identifier:
6013167
Alternate Identifier(s):
OSTI ID: 6013167
Resource Type:
Journal Article
Journal Name:
Sov. Phys. - Solid State (Engl. Transl.); (United States)
Additional Journal Information:
Journal Volume: 21:2
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; YTTRIUM CARBIDES; CRITICAL FIELD; TRANSITION TEMPERATURE; HIGH PRESSURE; SUPERCONDUCTIVITY; SYNTHESIS; VERY HIGH TEMPERATURE; CARBIDES; CARBON COMPOUNDS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; MAGNETIC FIELDS; PHYSICAL PROPERTIES; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS 360204* -- Ceramics, Cermets, & Refractories-- Physical Properties; 656102 -- Solid State Physics-- Superconductivity-- Acoustic, Electronic, Magnetic, Optical, & Thermal Phenomena-- (-1987)

Citation Formats

Vereshchagin, L.F., Novokshonov, V.I., Evdokimova, V.V., and Khlybov, E.P. Superconductivity of yttrium sesquicarbide synthesized at high pressures. United States: N. p., 1979. Web.
Vereshchagin, L.F., Novokshonov, V.I., Evdokimova, V.V., & Khlybov, E.P. Superconductivity of yttrium sesquicarbide synthesized at high pressures. United States.
Vereshchagin, L.F., Novokshonov, V.I., Evdokimova, V.V., and Khlybov, E.P. Thu . "Superconductivity of yttrium sesquicarbide synthesized at high pressures". United States.
@article{osti_6013167,
title = {Superconductivity of yttrium sesquicarbide synthesized at high pressures},
author = {Vereshchagin, L.F. and Novokshonov, V.I. and Evdokimova, V.V. and Khlybov, E.P.},
abstractNote = {Superconducting (T/sub c/ from 4.5 to 12.6 /sup 0/K) yttrium sesquicarbide with the bcc structure of the Pu/sub 2/C/sub 3/ type was synthesized at high pressures (30--90 kbar) and high temperatures (1100--1700 /sup 0/C). Superconducting samples were prepared from charges of different compositions and the lattice parameter of the cubic phase varied from 8.190 to 8.250 A. A superconducting phase was also prepared easily under the same conditions from yttrium carbides of unknown structure, which were made by arc melting. The initial parts of the curves representing the critical magnetic fields were determined and these were used to extrapolate the critical magnetic field to 0 /sup 0/K. The maximum critical field was 14 T. Doping of yttrium carbide with some transition metals increased the critical temperature to 15 /sup 0/K and the critical field to 16 T.},
doi = {},
journal = {Sov. Phys. - Solid State (Engl. Transl.); (United States)},
number = ,
volume = 21:2,
place = {United States},
year = {1979},
month = {2}
}