Nonmagnetic–magnetic transition in Yb(Cu1 xNix)2Si2studied by muon-spin relaxation

Autor:	Anthony A. Amato, Daniel Andreica, A. Schenck, F. N. Gygax
Rok vydání:	2003
Předmět:	RKKY interaction Condensed matter physics Chemistry Transition temperature Volume fraction Relaxation (NMR) General Materials Science Kondo effect Muon spin spectroscopy Condensed Matter Physics Ground state Ion
Zdroj:	Journal of Physics: Condensed Matter. 15:6997-7017
ISSN:	1361-648X 0953-8984
Popis:	The muon-spin relaxation technique has been used to investigate the transition from a nonmagnetic to a magnetic ground state in Yb(Cu1−xNix)2Si2. The effect of the chemical substitution of Cu by Ni on the magnetic properties is evidenced by an unusual occurrence of magnetic ordering, characterized by an x-dependent magnetic volume fraction. Both the magnetic transition temperature and the magnetic volume fraction are observed to increase with Ni concentration. It is found that the size of the magnetic volume fraction depends on the probability of an Yb ion possessing at least two Ni ions as nearest neighbours. The transition temperature of YbNi2Si2 is shown to be reduced compared to that of the pressurized YbCu2Si2 at equivalent volume and is related to electron doping effects. Using a scaling law for the temperature dependence of the relaxation rates of the Yb-moments, the Kondo temperature is deduced and found to decrease, as expected, with increasing Ni concentration.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e34c99c222236a59b69d01e30f0b7bb3 https://doi.org/10.1088/0953-8984/15/41/009 Zobrazit plný text záznamu