Sai, Ranajit and Endo, Yasushi and Shimada, Yutaka and Yamaguchi, Masahiro and Shivashankar, SA (2015) Oriented nanometric aggregates of partially inverted zinc ferrite: One-step processing and tunable high-frequency magnetic properties. In: JOURNAL OF APPLIED PHYSICS, 117 (17).
![]() |
PDF
Jou_of_App_Phy_117_7_17E511_2015.pdf - Published Version Restricted to Registered users only Download (2MB) | Request a copy |
Abstract
In this work, it is demonstrated that the in situ growth of oriented nanometric aggregates of partially inverted zinc ferrite can potentially pave a way to alter and tune magnetocrystalline anisotropy that, in turn, dictates ferromagnetic resonance frequency (f(FMR)) by inducing strain due to aggregation. Furthermore, the influence of interparticle interaction on magnetic properties of the aggregates is investigated. Mono-dispersed zinc ferrite nanoparticles (<5 nm) with various degrees of aggregation were prepared through decomposition of metal-organic compounds of zinc (II) and iron (III) in an alcoholic solution under controlled microwave irradiation, below 200 degrees C. The nanocrystallites were found to possess high degree of inversion (>0.5). With increasing order of aggregation in the samples, saturation magnetization (at 5 K) is found to decrease from 38 emu/g to 24 emu/g, while coercivity is found to increase gradually by up to 100% (525 Oe to 1040 Oe). Anisotropy-mediated shift of f(FMR) has also been measured and discussed. In essence, the result exhibits an easy way to control the magnetic characteristics of nanocrystalline zinc ferrite, boosted with significant degree of inversion, at GHz frequencies. (C) 2015 AIP Publishing LLC.
Item Type: | Journal Article |
---|---|
Publication: | JOURNAL OF APPLIED PHYSICS |
Publisher: | AMER INST PHYSICS |
Additional Information: | Copy right for this article belongs to the AMER INST PHYSICS, 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA |
Department/Centre: | Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering |
Date Deposited: | 26 Jun 2015 06:44 |
Last Modified: | 26 Jun 2015 06:44 |
URI: | http://eprints.iisc.ac.in/id/eprint/51776 |
Actions (login required)
![]() |
View Item |