Para, ferro and antiferromagnetic properties of MnO2 and Ce1−x Mn x O2 nanoparticles

Para, ferro and antiferromagnetic properties of MnO2 and Ce1−x Mn x O2 nanoparticles Manganese-substituted cerium oxide nanoparticles (Ce1−x Mn x O2) at x = 0.00, 0.03 and 0.05 were prepared using ball milling technique and the milled powder samples were subjected to different characterization techniques such as X-ray diffractometer (XRD), scanning electron microscope with energy dispersive analysis of X-rays and vibrating sample magnetometer to study the structural, morphology and magnetic properties, respectively. From XRD, it was confirmed that the prepared samples were in Cubic structure at all Mn-doping concentrations and no evidence of impurities were found. The crystallite sizes of the powders were in the range of 30–44 nm and it decreased with increase of Mn substitution. The SEM images reflected that the grains are uniform in size and are in spherical shape. From magnetic studies, it was found that the bulk MnO2 was paramagnetic in nature, whereas the CeO2 nanoparticles were soft ferromagnetic at room temperature. The pure CeO2 nanoparticles exhibited a magnetization of 4.79 memu/g, coercivity of 389 Oe, and retentivity of 2.08 memu/g. A drastic change in magnetic behaviour of CeO2 nanoparticles was found by the substitution of Mn into the CeO2 host lattice. The Ce1−x Mn x O2 nanoparticles exhibited soft ferromagnetism at low field and antiferromagnetism at high applied magnetic fields. No magnetic saturation was found in Ce1−x Mn x O2 nanoparticles even when the magnetic field is increased to 15 kOe. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Physics A: Materials Science Processing Springer Journals

Para, ferro and antiferromagnetic properties of MnO2 and Ce1−x Mn x O2 nanoparticles

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2017 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Physics; Condensed Matter Physics; Optical and Electronic Materials; Nanotechnology; Characterization and Evaluation of Materials; Surfaces and Interfaces, Thin Films; Operating Procedures, Materials Treatment
ISSN
0947-8396
eISSN
1432-0630
D.O.I.
10.1007/s00339-017-1395-2
Publisher site
See Article on Publisher Site

Abstract

Manganese-substituted cerium oxide nanoparticles (Ce1−x Mn x O2) at x = 0.00, 0.03 and 0.05 were prepared using ball milling technique and the milled powder samples were subjected to different characterization techniques such as X-ray diffractometer (XRD), scanning electron microscope with energy dispersive analysis of X-rays and vibrating sample magnetometer to study the structural, morphology and magnetic properties, respectively. From XRD, it was confirmed that the prepared samples were in Cubic structure at all Mn-doping concentrations and no evidence of impurities were found. The crystallite sizes of the powders were in the range of 30–44 nm and it decreased with increase of Mn substitution. The SEM images reflected that the grains are uniform in size and are in spherical shape. From magnetic studies, it was found that the bulk MnO2 was paramagnetic in nature, whereas the CeO2 nanoparticles were soft ferromagnetic at room temperature. The pure CeO2 nanoparticles exhibited a magnetization of 4.79 memu/g, coercivity of 389 Oe, and retentivity of 2.08 memu/g. A drastic change in magnetic behaviour of CeO2 nanoparticles was found by the substitution of Mn into the CeO2 host lattice. The Ce1−x Mn x O2 nanoparticles exhibited soft ferromagnetism at low field and antiferromagnetism at high applied magnetic fields. No magnetic saturation was found in Ce1−x Mn x O2 nanoparticles even when the magnetic field is increased to 15 kOe.

Journal

Applied Physics A: Materials Science ProcessingSpringer Journals

Published: Nov 29, 2017

References

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