Tunnel Magnetoresistance in Self-Assemblies of Exchange Coupled Core/Shell Nanoparticles

We report the precise control of tunneling magnetoresistance (TMR) in devices of self-assembled core/shell Fe\(_3\)O\(_4\)/Co\(_{1-x}\)Zn\(_x\)Fe\(_2\)O\(_4\) nanoparticles (\(0\leq x\leq 1\)). Adjusting the magnetic anisotropy through the content of Co\(^{2+}\) in the shell, provides an accurate to...

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Veröffentlicht in:arXiv.org 2020-05
Hauptverfasser: Fabris, Fernando, Lima, Enio, Quinteros, Cynthia, Nener, Lucas, Granada, Mara, Sirena, Martín, Zysler, Roberto D, Troiani, Horacio E, Leborán, Víctor, Rivadulla, Francisco, Winkler, Elin L
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Sprache:eng
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Zusammenfassung:We report the precise control of tunneling magnetoresistance (TMR) in devices of self-assembled core/shell Fe\(_3\)O\(_4\)/Co\(_{1-x}\)Zn\(_x\)Fe\(_2\)O\(_4\) nanoparticles (\(0\leq x\leq 1\)). Adjusting the magnetic anisotropy through the content of Co\(^{2+}\) in the shell, provides an accurate tool to control the switching field between the bistable states of the TMR. In this way, different combinations of soft/hard and hard/soft core/shell configurations can be envisaged for optimizing devices with the required magnetotransport response.
ISSN:2331-8422
DOI:10.48550/arxiv.2005.10771