Shock wave-induced switchable magnetic phase transition behaviour of ZnFe 2 O 4 ferrite nanoparticles
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ORIGINAL RESEARCH
Shock wave‑induced switchable magnetic phase transition behaviour of ZnFe2O4 ferrite nanoparticles V. Mowlika1 · A. Sivakumar2 · S. A. Martin Britto Dhas2 · C. S. Naveen3 · A. R. Phani3 · R. Robert1 Received: 4 February 2020 / Accepted: 15 May 2020 © Islamic Azad University 2020
Abstract The present work is designed to investigate the impact of shock waves on Zinc Ferrite nanoparticles ( ZnFe2O4) NPs. The test material was prepared by precipitation method and shock wave recovery experiment is done by tabletop pressure driven shock tube. The shock wave induced changes in structural, morphological and magnetic properties are noticed by various analytical techniques such as powder X-ray Diffractometer (PXRD), fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM) and the obtained PXRD results shows no significant structural changes. Switchable paramagnetic to superparamagnetic behaviour is observed during the shock wave loaded conditions. The mechanism of shock wave induced magnetic phase transition is discussed. Keywords ZnFe2O4 ferrite NPs · Shock waves · Grain size · Magnetic phase transition
Introduction Shock wave assisted experiments on bulk and nanocrystalline materials are getting remarkable attention by material science researchers in recent years. Understating the material properties at high pressure/low temperature and high pressure/high-temperature conditions are very much needed for better understanding the usual and unusual behaviour of materials. When materials exposed to this condition, the properties of the material undergo remarkable changes and these effects are well observed in the last several decades [1–5]. Such kinds of pressure-induced studies have provided the applicability of the materials for space, radar, thermal protecting and sensors applications [6]. Particularly, space electronic materials have higher chances to get effected by the gamma, electron, proton, thermal shock, etc. while entering into space environment [7]. If the electronic device materials were affected by the above external parameters, the * R. Robert [email protected] 1
Department of Physics, Government Arts College for Men, Krishnagiri, Tamilnadu 635 001, India
2
Department of Physics, Abdul Kalam Research Centre, Sacred Heart College, Thirupattur, Tamilnadu 635 601, India
3
Innovative Nano and Micro Technologies Private Limited, Bangalore, Karnataka 560 059, India
performance of the material is significantly affected. Hence, before inducing them into commercial applications, understanding their physical and chemical properties are highly required. When shock waves were propagated into the materials, it may produce phase transitions, defects, deformation and so on [8–10]. If, the test materials are not allowed any phase transition, deformation such materials are called as a high shock wave resistant material [11]. Hence, all electronic and device engineers are looking for such kind of high structural tendency m
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