Oxygen isotope effect in high-T C superconductors: Cu nuclear quadrupole resonance relaxation rates

Autor:	Takashi Ohno, Kunisuke Asayama
Rok vydání:	2000
Předmět:	Superconductivity Nuclear magnetic resonance Solid-state physics Chemistry Relaxation (NMR) Kinetic isotope effect Analytical chemistry Antiferromagnetism Nuclear quadrupole resonance Spin (physics) Atomic and Molecular Physics and Optics Isotopes of oxygen
Zdroj:	Applied Magnetic Resonance. 19:297-304
ISSN:	1613-7507 0937-9347
DOI:	10.1007/bf03162371
Popis:	A scaling relationship has been observed between the63Cu(2) spin-lattice relaxation rates 1/T 1,(18) and 1/T 1(16) observed in18O- and16O-exchanged YBa2Cu4O8 and the normalized temperatureT/T c(18 or 16). This relation implies thatT C is decreased by the change in antiferromagnetic (AF) spin fluctuation rate. Thus oxygen isotope effect observed in high-T C superconductors does not indicate any importance of electron-phonon interaction but it appears to originate from the change in AF fluctuations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::990c64f54835ac0364366b47667a87d2 https://doi.org/10.1007/bf03162371 Zobrazit plný text záznamu Full text from SpringerLink