Superconductivity in the lanthanum-yttrium-manganese alloy system [electronic resource].
- Published
- Ames, Iowa : Ames Laboratory, 1980.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- Pages: 37 : digital, PDF file
- Additional Creators
- Ames Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- An empirical approach involving lattice instabilities was investigated in the search for new superconducting materials. Pseudo-lanthanide compounds using La and Y were prepared for the system La/sub 1-x/Y/sub x/Mn/sub 2/ by arc melting and subsequent heat treatment. Low temperature magnetic susceptibility and low temperature heat capacity measurements were made. The unit cell lattice parameters were determined from x-ray powder patterns taken on most samples and metallographic examination was carried out on selected samples. Alloys with low La concentrations (x greater than or equal to 0.6) showed RMn/sub 2/ in the cubic C15 Laves phase as the major component with second phase material present. The magnetic susceptibility and x-ray data indicated a superconducting phase which seemed to be the RMn/sub 2/ phase, but heat capacity measurements showed the second phase material was the superconductor, while the RMn/sub 2/ was not. Failure to form compounds with higher La content was experienced and may be due to the lattice instability expected at x = 0.56. This indicates that perhaps more stingent conditions are required to form pseudo-lanthanide compounds than were previously considered. More systems should be investigated to see if this is true, and to determine the possibilities of this approach.
- Report Numbers
- E 1.99:is-t-895
is-t-895 - Subject(s)
- Other Subject(s)
- Lanthanum Alloys
- Lattice Parameters
- Manganese Alloys
- Superconductors
- Fabrication
- Yttrium Alloys
- Intermetallic Compounds
- Magnetic Susceptibility
- Stability
- Superconductivity
- Ternary Alloy Systems
- Ultralow Temperature
- Alloy Systems
- Alloys
- Electric Conductivity
- Electrical Properties
- Magnetic Properties
- Physical Properties
- Rare Earth Alloys
- Note
- Published through SciTech Connect.
03/01/1980.
"is-t-895"
Stierman, R.J. - Funding Information
- W-7405-ENG-82
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