Nuclear magnetic resonance study of hydrogen diffusion in A15-type Nb3AlHx

Autor:	A.P. Stepanov, V. N. Kozhanov, Alexei V. Soloninin, Alexander V. Skripov
Rok vydání:	2000
Předmět:	Range (particle radiation) Nuclear magnetic resonance Proton Hydrogen Chemistry Relaxation rate chemistry.chemical_element General Materials Science Diffusion (business) Atmospheric temperature range Condensed Matter Physics
Zdroj:	Journal of Physics: Condensed Matter. 12:9607-9616
ISSN:	1361-648X 0953-8984
Popis:	Nuclear magnetic resonance measurements of the proton spin-lattice relaxation rate T1-1 for A15-type Nb3AlHx (x = 0.13, 1.77 and 2.75) have been performed over the temperature range 20-420 K and the resonance frequency range 13-90 MHz. The experimental results are analysed to evaluate the electronic (Korringa) contributions to T1-1 and the parameters of hydrogen diffusion. It is found that the electronic contribution to the relaxation rate decreases with increasing H content. The effective activation energies for H diffusion derived from the high-temperature relaxation rate data are 0.21 eV for x = 0.13 and 0.30 eV for x = 1.77 and 2.75. The behaviour of T1-1 at low temperatures (T
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::956862b8c5938b1e93618f5fee50a130 https://doi.org/10.1088/0953-8984/12/46/308 Zobrazit plný text záznamu