Superparamagnetic behavior of MOCVD grown ZnO:Co films

被引：1
|
作者：
Kytin, Vladimir G. [1 ]
Maximova, Olga V. [1 ]
Kulbachinskii, Vladimir A. [1 ,2 ]
Burova, Lidia I. [1 ]
Kaul, Andrey R. [1 ]
Bandyopadhya, Sudipta [3 ,4 ]
Ahmed, Azaharuddin [3 ,4 ]
Banerjee, Aritra [3 ,4 ]
机构：
[1] MV Lomonosov MSU, GSP 1, Moscow 119991, Russia
[2] Natl Res Nucl Univ MEPhI, Moscow 115409, Russia
[3] Univ Calcutta, Kolkata, W Bengal, India
[4] 92 Acharya Prafulla Chandra Rd, Kolkata 700009, India
来源：
MOSCOW INTERNATIONAL SYMPOSIUM ON MAGNETISM (MISM 2017) | 2018年 / 185卷
关键词：
FERROMAGNETISM;
D O I：
10.1051/epjconf/201818506009
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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
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页数：4
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