Effect of carbon encapsulation on magnetic inter-particle interaction of iron nanoparticles

Jan, Husna and Prasad, V (2024) Effect of carbon encapsulation on magnetic inter-particle interaction of iron nanoparticles. In: Physica B: Condensed Matter, 676 .

PDF phy_con_676_2024.pdf - Published Version Restricted to Registered users only Download (2MB)

Abstract

Carbon encapsulation of magnetic nanoparticles reduces agglomeration and makes the nanoparticles stable. In this work, as-prepared carbon-coated iron nanoparticles (CCFeNPs) are treated with hydrogen peroxide (H2O2) solution, and the effect of carbon coating on the interparticle interaction of iron nanoparticles is discussed. Morphological characterization and the magnetization data confirmed that the treatment removes some coating layers. Field cooled (FC) and zero-field cooled (ZFC) measurements on the two samples revealed that the blocking temperature (TB) of the treated sample is lowered post hydrogen peroxide treatment. Magnetic interaction is increased in the treated sample compared to the as-prepared one and follows the Morup�Tronc (MT) model of inter-particle interactions (IPI). MR/MS ratio decreases post-treatment, indicating an increase in IPI after treatment. Out-of-phase AC susceptibility data showed two slope changes; one at a higher temperature indicates the magnetic blocking of core Fe, and the other at a lower temperature with a broad peak that shifts with frequency due to spin-glass behavior in the system. © 2024 Elsevier B.V.

Item Type:	Journal Article
Publication:	Physica B: Condensed Matter
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to author
Keywords:	Association reactions; Carbon; Hydrogen peroxide; Iron; Magnetic susceptibility; Nanomagnetics; Nanoparticles; Particle interactions; Spin glass, Blocking temperature; Carbon coating; Carbon-coated; Carbon-coated iron nanoparticle; Effect of carbons; Field cooled; Inter-particle interaction; Iron nanoparticles; Selected area electron diffraction; Zero-field-cooled, Oxidation
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	04 Mar 2024 05:29
Last Modified:	04 Mar 2024 05:29
URI:	https://eprints.iisc.ac.in/id/eprint/83891

Actions (login required)

View Item