Jump to main content
Jump to site search

Issue 25, 2018
Previous Article Next Article

Enhancing low-field magnetoresistance in magnetite nanoparticles via zinc substitution

Author affiliations

Abstract

We report a strategy to enhance the room temperature low-field magnetoresistance (LFMR) behavior of Fe3O4 nanoparticle (NP) assemblies by controlled Zn-substitution. The Zn-substituted 7 nm ZnxFe3−xO4, (x = 0 to 0.4) NPs are prepared by thermal decomposition of metal acetylacetonates (M(acac)n, M = Fe2+, Fe3+, and Zn2+). The substitution increases NP magnetic susceptibility (χ) and makes the magnetic moment more sensitive to low magnetic fields. As a result, the Zn0.3Fe2.7O4 NP assembly with NPs separated by tridecanoate exhibits a large magnetoresistance (MR) ratio of −14.8% at 300 K under a 4.5 kOe magnetic field. The demonstrated approach to control NP substitution to enhance low-field magnetoresistance of the NP assemblies provides an attractive new strategy to fabricate Fe3O4-based magnetic NP assemblies with desirable transport properties for sensitive spintronic applications.

Graphical abstract: Enhancing low-field magnetoresistance in magnetite nanoparticles via zinc substitution

Back to tab navigation

Supplementary files

Publication details

The article was received on 05 Feb 2018, accepted on 30 May 2018 and first published on 31 May 2018


Article type: Paper
DOI: 10.1039/C8CP00843D
Citation: Phys. Chem. Chem. Phys., 2018,20, 17245-17252
  •   Request permissions

    Enhancing low-field magnetoresistance in magnetite nanoparticles via zinc substitution

    T. Wang, Z. Luan, J. Ge, L. Liu, D. Wu, Z. Lv, J. Zuo and S. Sun, Phys. Chem. Chem. Phys., 2018, 20, 17245
    DOI: 10.1039/C8CP00843D

Search articles by author

Spotlight

Advertisements