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NMR EVIDENCE FOR A CHANGE IN LOCAL ELECTRONIC-STRUCTURE ACCOMPANYING HYDROGEN PAIRING IN YTTRIUM-HYDROGEN SOLID-SOLUTIONS
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UNSPECIFIED (1991) NMR EVIDENCE FOR A CHANGE IN LOCAL ELECTRONIC-STRUCTURE ACCOMPANYING HYDROGEN PAIRING IN YTTRIUM-HYDROGEN SOLID-SOLUTIONS. PHYSICAL REVIEW B, 44 (17). pp. 9692-9695.
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Abstract
Measurements of the proton spin-lattice relaxation (SLR) rate in yttrium-hydrogen solid solutions (alpha-YH(x)) show that the hydrogen-pairing phenomenon, which occurs in the temperature range 170-300 K, is accompanied by a continuous, strong (22%) decrease in the Korringa parameter, R1e/T, with decreasing temperature, where R1e, is the conduction-electron contribution to the total SLR rate. This shows that a substantial (37%) change occurs in the product of the hyperfine field at the proton site and the local d-band density of states at the Fermi level, Nd(E(F)), when hydrogens become paired. Similar behavior has not been detected in the corresponding Sc-H and Lu-H systems in which pairing also occurs.
Item Type: | Journal Item | ||||
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Subjects: | Q Science > QC Physics | ||||
Journal or Publication Title: | PHYSICAL REVIEW B | ||||
Publisher: | AMERICAN PHYSICAL SOC | ||||
ISSN: | 0163-1829 | ||||
Official Date: | 1 November 1991 | ||||
Dates: |
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Volume: | 44 | ||||
Number: | 17 | ||||
Number of Pages: | 4 | ||||
Page Range: | pp. 9692-9695 | ||||
Publication Status: | Published |
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