Transport and magnetic properties of yttrium doped NdFeAs(O,F) superconductor

Autor:	P. M. Aswathy, A. Bharathi, K. Vinod, J. B. Anooja, Neson Varghese, Upendran Syamaprasad
Rok vydání:	2013
Předmět:	Superconductivity Materials science Condensed matter physics Mechanical Engineering Doping Metals and Alloys chemistry.chemical_element Yttrium Ion chemistry Mechanics of Materials Electrical resistivity and conductivity Lattice (order) Lattice defects Materials Chemistry
Zdroj:	Journal of Alloys and Compounds. 566:43-49
ISSN:	0925-8388
DOI:	10.1016/j.jallcom.2013.02.125
Popis:	The transport and magnetic properties of the undoped and yttrium doped NdFeAs(O,F) superconductor are investigated in detail for the first time. The transition temperatures of the yttrium doped samples are found to increase monotonically and attain a maximum of 53.3 K for 30% yttrium doping, ∼4 K higher as compared to the yttrium free sample. The T C values observed from the temperature dependent ac susceptibility measurements are also in agreement with the resistivity measurements. Yttrium doping is found to decrease the lattice parameters of the system; causing an inner chemical pressure and thereby accomplishing a T C enhancement. Moreover, the substitution of relatively smaller yttrium ion at Nd site creates lattice defects which act as effective pinning centers thereby enhancing the J C ( H ) performance of the system.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4bcdf843691aaf296b30a24bc172f4c7 https://doi.org/10.1016/j.jallcom.2013.02.125 Zobrazit plný text záznamu Full Text from ScienceDirect