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Zinc doping effects on the magnetic properties of Nd0.65Ca0.35Mn0.9Zn0.1O3 nanomanganite

Paul, Daly and Anuradha, KN and Bhat, SV (2017) Zinc doping effects on the magnetic properties of Nd0.65Ca0.35Mn0.9Zn0.1O3 nanomanganite. In: INTERNATIONAL JOURNAL OF NANOTECHNOLOGY, 14 (9-11, ). pp. 885-892.

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Official URL: http://doi.org/10.1504/IJNT.2017.086772

Abstract

In this paper, we report the synthesis and magnetic properties of Nd0.65Ca0.35Mn0.9Zn0.1O3 manganite. Bulk (NZOB) and nanoparticles (NZON) of hole-doped Nd0.65Ca0.35Mn0.9Zn0.1O3 were prepared by sol gel method. These particles were characterised by XRD, TEM and EDAX. Magnetisation measurements were carried out in temperature range 10 K <= T <= 300 K by a SQUID magnetometer. The parent bulk Nd0.65Ca0.35MnO3 (NCMO) manganite exhibits charge order (CO) around the temperature 210 K followed by an antiferromagnetic (AFM) transition at the Neel temperature (T-N = 120 K). With the doping of nonmagnetic Zn2+ cation, the valency balance is maintained by the creation of Mn4+ ions, which leads to ferromagnetism owing to the double exchange interaction between Mn3+ and Mn4+. Magnetisation measurements show that the ferromagnetic component enhances in nanoparticles (NZON) as compared to its bulk counterpart at low temperature, along with some amount of residual antiferromagnetism owing to the uncompensated surface spins. Further the temperature dependence of magnetisation (M*T vs. T) shows the melting of CO in both the samples. The ferromagnetic transition temperature (Tc) is found to be higher (similar to 53 K) in nanosample (size about 20 nm) when compared with its bulk counterpart (similar to 41 K).

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the INDERSCIENCE ENTERPRISES LTD, WORLD TRADE CENTER BLDG, 29 ROUTE DE PRE-BOIS, CASE POSTALE 856, CH-1215 GENEVA, SWITZERLAND
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 01 Dec 2017 06:48
Last Modified: 21 Feb 2019 09:58
URI: http://eprints.iisc.ac.in/id/eprint/58372

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