Systematics of the anomalous high-temperature 45Sc spin–lattice relaxation in scandium hydrides and deuterides

Autor:	R. G. Barnes, D. R. Torgeson, Michael Jerosch-Herold
Rok vydání:	1997
Předmět:	Mechanical Engineering Enthalpy Relaxation (NMR) Metals and Alloys Spin–lattice relaxation chemistry.chemical_element Metal chemistry Mechanics of Materials Vacancy defect visual_art Excited state Materials Chemistry visual_art.visual_art_medium Scandium Atomic physics Excitation
Zdroj:	Journal of Alloys and Compounds. :441-444
ISSN:	0925-8388
Popis:	The nuclear magnetic resonance of the metal nucleus 45Sc shows anomalous spin–lattice relaxation at high temperatures (T≥800 K) in scandium dihydride and dideuteride. The anomalous rate R1A is represented by R1A=Aexp(−U/kBT), with an effective excitation enthalpy U and strength A. U increases sharply with decreasing H(D) vacancy concentration as [H(D)]/[Sc]→2.00. These new measurements and analysis support the concept of stable clusters of interacting thermally excited H(D) Frenkel interstitials and vacancies in fluorite-structure dihydrides and dideuterides.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::edae0c696ee8be4b89453b82758a5cc6 https://doi.org/10.1016/s0925-8388(96)02944-1 Zobrazit plný text záznamu Full Text from ScienceDirect