Abstract

Temperature and field dependences of magnetization have been measured for Co-doped ZnO films with different Co content grown by MOCVD on sapphire substrates. Measured field dependences of magnetization show ferromagnetic-like hysteresis loops and paramagnetic contribution. Coercive field decreases with an increase of Co content and temperature. The difference between temperature dependences of magnetization measured in zero field cooling and field cooling conditions was observed in the temperature range from 2 K to 300 K indicating superparamagnetic behaviour of the films. The distribution of blocking temperatures extracted from the temperature dependences of magnetization is broad and shifts to the low blocking temperatures with an increase of Co content

Details

Title
Superparamagnetic behavior of MOCVD grown ZnO:Co films
Author
Kytin, Vladimir G; Maximova, Olga V; Kulbachinskii, Vladimir A; Burova, Lidia I; Kaul, Andrey R; Bandyopadhya, Sudipta; Azaharuddin Ahmed; Banerjee, Aritra
Section
Magnetic Semiconductors and Oxides
Publication year
2018
Publication date
2018
Publisher
EDP Sciences
ISSN
21016275
e-ISSN
2100014X
Source type
Conference Paper
Language of publication
English
ProQuest document ID
2066470106
Copyright
© 2018. This work is licensed under http://creativecommons.org/licenses/by/4.0 (the “License”). Notwithstanding the ProQuest Terms and conditions, you may use this content in accordance with the terms of the License.