Chawla, Santa and K. , Jayanthi and Kotnala , R. K. (2009) Room-temperature ferromagnetism in Li-doped p-type luminescent ZnO nanorods. Physical Review B, 79 (12). pp. 125204-1. ISSN 1550-235X

Preview

PDF - Published Version Download (641Kb) | Preview

Abstract

We have observed ferromagnetism in Li-doped ZnO nanorods with Curie temperature up to 554 K. Li forms shallow acceptor states in substitutional zinc sites giving rise to p-type conductivity. An explicit correlation emerges between increase in hole concentration with decrease in magnetization and Curie temperature in ZnO:Li. Occurrence of ferromagnetism at room temperature has been established with observed magnetic domain formation in ZnO:Li pellets in magnetic force microscopy and prominent ferromagnetic resonance signal in electron paramagnetic resonance spectrum. Magnetic ZnO:Li nanorods are luminescent, showing strong near UV emission. Substitutional Li atoms can induce local moments on neighboring oxygen atoms, which when considered in a correlated model for oxygen orbitals with random potentials introduced by dopant atom could explain the observed ferromagnetism and high Curie temperature in ZnO:Li nanorods.

Item Type:	Article
Subjects:	Physics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	01 Oct 2012 09:23
Last Modified:	01 Oct 2012 09:23
URI:	http://npl.csircentral.net/id/eprint/632

Actions (login required)

View Item