Positron annihilation lifetime characterization of oxygen ion irradiated rutile TiO2

被引：33

作者：

Luitel, Homnath ^{[1
]}

Sarkar, A. ^{[2
]}

Chakrabarti, Mahuya ^{[3
]}

Chattopadhyay, S. ^{[4
]}

Asokan, K. ^{[5
]}

Sanyal, D. ^{[1
]}

机构：

[1] Ctr Variable Energy Cyclotron, 1-AF Bidhannagar, Kolkata 700064, India

[2] Bangabasi Morning Coll, Dept Phys, 19 Rajkumar Chakraborty Sarani, Kolkata 700009, India

[3] Acharya Prafulla Chandra Coll, Dept Phys, Kolkata 700131, India

[4] Maulana Azad Coll, Dept Phys, 8 Rafi Ahmed Kidwai Rd, Kolkata 700013, India

[5] Inter Univ Accelerator Ctr, Aruna Asaf Ali Marg, New Delhi 110067, India

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2016年 / 379卷

关键词：

Magnetic semiconductor; Ion beam irradiation; Density-functional theory; Positron annihilation spectroscopy; Defect induced ferromagnetism; ROOM-TEMPERATURE FERROMAGNETISM; INITIO MOLECULAR-DYNAMICS; TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; NANOPARTICLES; SEMICONDUCTORS; SPINTRONICS; TRANSITION; METALS; ZNO;

D O I：

10.1016/j.nimb.2016.04.014

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Ferromagnetic ordering at room temperature has been induced in rutile phase of TiO2 polycrystalline sample by O ion irradiation. 96 MeV O ion induced defects in rutile TiO2 sample has been characterized by positron annihilation spectroscopic techniques. Positron annihilation results indicate the formation of cation vacancy (V-Ti, Ti vacancy) in these irradiated TiO2 samples. Ab initio density functional theoretical calculations indicate that in TiO2 magnetic moment can be induced either by creating Ti or O vacancies. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：215 / 218

页数：4

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