Defects induced magnetic transition in Co doped ZnS thin films: Effects of swift heavy ion irradiations

被引：37
作者：
Patel, Shiv P. [1 ]
Pivin, J. C. [2 ]
Patel, M. K. [3 ]
Won, Jonghan [3 ]
Chandra, Ramesh [4 ]
Kanjilal, D. [5 ]
Kumar, Lokendra [1 ]
机构：
[1] Univ Allahabad, Dept Phys, Allahabad 211002, Uttar Pradesh, India
[2] CNRS, IN2P3, CSNSM, F-91405 Orsay, France
[3] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA
[4] Indian Inst Technol, IIC, Nanosci Lab, Roorkee 247667, Uttar Pradesh, India
[5] Inter Univ Accelerator Ctr, New Delhi 110067, India
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2012年 / 324卷 / 13期
关键词：
DMS; SHI irradiation; SQUID; Ion track; Defect; ROOM-TEMPERATURE FERROMAGNETISM; ELECTRICAL-TRANSPORT; TRANSFORMATION; DEPOSITION; TIO2;
D O I：
10.1016/j.jmmm.2012.02.031
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of swift heavy ions (SHI) on magnetic ordering in ZnS thin films with Co ions substituted on Zn sites is investigated. The materials have been synthesized by pulsed laser deposition on substrates held at 600 degrees C for obtaining films with wurtzite crystal structure and it showed ferromagnetic ordering up to room temperature with a paramagnetic component. 120 MeV Ag ions have been used at different fluences of 1 x 10(11) ions/cm(2) and 1 x 10(12) ions/cm(2) for SHI induced modifications. The long range correlation between paramagnetic spins on Co ions was destroyed by irradiation and the material became purely paramagnetic. The effect is ascribed to the formation of cylindrical ion tracks due to the thermal spikes resulting from electron-phonon coupling. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：2136 / 2141
页数：6
相关论文
共 41 条
[11]   Columnar tilt and vortex stress in superconducting thin films of NdBa2Cu3O7-δ:: Magnetization critical current-density measurements [J].
Khatua, S ;
Mishra, PK ;
Kumar, R ;
Kundaliya, DC ;
Buddhikot, D ;
Pinto, R ;
Malik, SK .
JOURNAL OF APPLIED PHYSICS, 2004, 96 (12) :7403-7406
[12]   OPTICAL-ABSORPTION OF CO2+ IN ZNO [J].
KOIDL, P .
PHYSICAL REVIEW B, 1977, 15 (05) :2493-2499
[13]   Structural, electrical transport, magnetization, and 1/f noise studies in 200 MeV Ag ion irradiated La0.7Ce0.3MnO3 thin films [J].
Kumar, R ;
Choudhary, RJ ;
Patil, SI ;
Husain, S ;
Srivastava, JP ;
Sanyal, SP ;
Lofland, SE .
JOURNAL OF APPLIED PHYSICS, 2004, 96 (12) :7383-7387
[14]   Swift heavy ion irradiation-induced modifications in structural, magnetic and electrical transport properties of epitaxial magnetite thin films [J].
Kumar, Ravi ;
Khan, M. Wasi ;
Srivastava, J. P. ;
Arora, S. K. ;
Sofin, R. G. S. ;
Choudhary, R. J. ;
Shvets, I. V. .
JOURNAL OF APPLIED PHYSICS, 2006, 100 (03)
[15]   Achieving Ferromagnetism in Single-Crystalline ZnS Wurtzite Nanowires via Chromium Doping [J].
Li, Yafei ;
Zhou, Zhen ;
Jin, Peng ;
Chen, Yongsheng ;
Zhang, Shengbai B. ;
Chen, Zhongfang .
JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (28) :12099-12103
[16]   Ferromagnetism induced by defect complex in Co-doped ZnO [J].
Liu, En-Zuo ;
He, Yan ;
Jiang, J. Z. .
APPLIED PHYSICS LETTERS, 2008, 93 (13)
[17]   Role of point defects in room-temperature ferromagnetism of Cr-doped ZnO [J].
Liu, Hui ;
Zhang, Xiao ;
Li, Luyan ;
Wang, Y. X. ;
Gao, K. H. ;
Li, Z. Q. ;
Zheng, R. K. ;
Ringer, S. P. ;
Zhang, Bei ;
Zhang, X. X. .
APPLIED PHYSICS LETTERS, 2007, 91 (07)
[18]   Effect of substrate temperature on pulsed laser ablated Zn0.95Co0.05O diluted magnetic semiconducting thin films [J].
Liu, Q. ;
Yuan, C. L. ;
Gan, C. L. ;
Han, G. C. .
JOURNAL OF APPLIED PHYSICS, 2007, 101 (07)
[19]   Nature of the reversible paramagnetism to ferromagnetism state in cobalt-doped titanium dioxide [J].
Manivannan, A ;
Glaspell, G ;
Dutta, P ;
Seehra, MS .
JOURNAL OF APPLIED PHYSICS, 2005, 97 (10)
[20]   Co-metal clustering as the origin of ferromagnetism in Co-doped ZnO thin films [J].
Park, JH ;
Kim, MG ;
Jang, HM ;
Ryu, S ;
Kim, YM .
APPLIED PHYSICS LETTERS, 2004, 84 (08) :1338-1340
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