Exchange Bias Effects in Iron Oxide-Based Nanoparticle Systems
Manh-Huong Phan,Javier Alonso,Hafsa Khurshid,Paula Lampen-Kelley,Sayan Chandra,Kristen Stojak Repa,Zohreh Nemati,Raja Das,Òscar Iglesias,Hariharan Srikanth +9 more
TL;DR: In this paper, the authors provide a thorough understanding of the EB and related phenomena in iron oxide-based nanoparticle systems, knowledge of which is essential to tune the anisotropic magnetic properties of exchange-coupled nanoparticles for potential applications.
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Abstract: The exploration of exchange bias (EB) on the nanoscale provides a novel approach to improving the anisotropic properties of magnetic nanoparticles for prospective applications in nanospintronics and nanomedicine. However, the physical origin of EB is not fully understood. Recent advances in chemical synthesis provide a unique opportunity to explore EB in a variety of iron oxide-based nanostructures ranging from core/shell to hollow and hybrid composite nanoparticles. Experimental and atomistic Monte Carlo studies have shed light on the roles of interface and surface spins in these nanosystems. This review paper aims to provide a thorough understanding of the EB and related phenomena in iron oxide-based nanoparticle systems, knowledge of which is essential to tune the anisotropic magnetic properties of exchange-coupled nanoparticle systems for potential applications.
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Claudiu Bulbucan,Pau Ternero,Calle Preger,Aram Kostanyan,Maria E. Messing,Rasmus Westerström +5 more
TL;DR: In this article , the influence of particle size on the formation of antiferromagnetic FexO subdomains and the emergence of exchange bias in novel ferrimagnetic Cr-substituted Fe3O4 nanoparticles generated using an aerosol technique based on spark ablation was studied.
2
Light-Switchable Exchange-Coupled Magnet
Divya Rajan,John M. Cain,T. V. Brinzari,Cauê F. Ferreira,Nicholas G. Rudawski,Ashley C. Felts,Mark W. Meisel,Daniel R. Talham +7 more
- 18 Nov 2019
TL;DR: In this paper, a light switchable hard magnet/soft magnet composite is described for which light irradiation breaks the exchange coupling between the two components, and a light-switchable soft magnet/hard magnet composite composite is presented.
2
Manipulating the morphology of the nano oxide domain in AuCu–iron oxide dumbbell-like nanocomposites as a tool to modify magnetic properties
Sharif Najafishirtari,Aidin Lak,Clara Guglieri,Sergio Marras,Rosaria Brescia,Sergio Fiorito,Sergio Fiorito,Elaheh Sadrollahi,F. J. Litterst,Teresa Pellegrino,Liberato Manna,Massimo Colombo +11 more
TL;DR: In this article, the authors reported the colloidal synthesis of hybrid dumbbell-like nanocrystals which feature a plasmonic metal domain (M) attached to a morphologically-tunable magnetic oxide domain (MOx) and highlighted how the modulation of the amount of oleic acid (OlAc) in the synthesis mixture influences the final composition of the M domain, the morphology of the MOx domain and, consequently, the magnetic properties of the hetero-structures.
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