Room Temperature Magnetic Memory Effect in Cluster-Glassy Fe-Doped NiO Nanoparticles

The Fe-doped NiO nanoparticles that were synthesized using a co-precipitation method are characterized by enhanced room-temperature ferromagnetic property evident from magnetic measurements. Neutron powder diffraction experiments suggested an increment of the magnetic moment of 3d ions in the nanopa...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2020-07, Vol.10 (7), p.1318
Main Authors: Gandhi, Ashish Chhaganlal, Li, Tai-Yue, Kumar, B. Vijaya, Reddy, P. Muralidhar, Peng, Jen-Chih, Wu, Chun-Ming, Wu, Sheng Yun
Format: Article
Language:English
Subjects:
4:1 defect cluster
Fe-doped NiO
intraparticle interactions
magnetic memory effect
room temperature
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Summary:The Fe-doped NiO nanoparticles that were synthesized using a co-precipitation method are characterized by enhanced room-temperature ferromagnetic property evident from magnetic measurements. Neutron powder diffraction experiments suggested an increment of the magnetic moment of 3d ions in the nanoparticles as a function of Fe-concentration. The temperature, time, and field-dependent magnetization measurements show that the effect of Fe-doping in NiO has enhanced the intraparticle interactions due to formed defect clusters. The intraparticle interactions are proposed to bring additional magnetic anisotropy energy barriers that affect the overall magnetic moment relaxation process and emerging as room temperature magnetic memory. The outcome of this study is attractive for the future development of the room temperature ferromagnetic oxide system to facilitate the integration of spintronic devices and understanding of their fundamental physics.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano10071318