Defect driven ferromagnetism in SnO2: a combined study using density functional theory and positron annihilation spectroscopy

被引：37

作者：

Sarkar, A. ^{[1
]}

Sanyal, D. ^{[2
]}

Nath, Palash ^{[3
]}

Chakrabarti, Mahuya ^{[3
]}

Pal, S. ^{[3
]}

Chattopadhyay, S. ^{[4
]}

Jana, D. ^{[3
]}

Asokan, K. ^{[5
]}

机构：

[1] Bangabasi Morning Coll, Dept Phys, Kolkata 700009, India

[2] Ctr Variable Energy Cyclotron, Kolkata 700064, India

[3] Univ Calcutta, Dept Phys, Kolkata 700009, India

[4] Maulana Azad Coll, Dept Phys, Kolkata 700013, India

[5] Inter Univ Accelerator Ctr, New Delhi 110067, India

来源：

RSC ADVANCES | 2015年 / 5卷 / 02期

关键词：

ROOM-TEMPERATURE FERROMAGNETISM; INITIO MOLECULAR-DYNAMICS; TOTAL-ENERGY CALCULATIONS; MAGNETISM; ORIGIN; EFFICIENCY;

D O I：

10.1039/c4ra11658e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Room temperature ferromagnetic ordering has been observed in a high purity polycrystalline SnO2 sample due to irradiation of 96 MeV oxygen ions. Ab initio density functional theory calculation indicates that tin vacancies are mainly responsible for inducing the magnetic moment in SnO2 whereas oxygen vacancies in SnO2 do not contribute any magnetic moment. Positron annihilation spectroscopy has been employed to characterize the chemical identity of irradiation generated defects in SnO2. Results indicate the dominant presence of Sn vacancies in O ion irradiated SnO2. The irradiated sample turns out to be ferromagnetic at room temperature.

引用

页码：1148 / 1152

页数：5

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