Coherent optical spectroscopy characterization of the magnetic properties of oriented Fe3O4 nanoparticles. Issue 1 (1st March 2022)

• Record Type: Journal Article
• Authors: Taskova, E; Alipieva, E; Kolev, S; Koutzarova, T; Brazhnikov, D
• Is Part Of: Journal of physics. Volume 2240:Issue 1(2022)
• Publication Date: 2022-03-01
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/2240/1/012022
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: Magnetite (Fe3 O4 ) nanoparticles are widely used in microwave components, such as microwave absorbers and anti-reflection coatings. Their magnetic properties are important for these applications. In this work, the weak magnetic field created by the Fe3 O4 nanoparticles was estimated using a coherent-spectroscopy all-optical method for measurement of weak magnetic fields. Both the magnitude and the direction of the magnetic field were evaluated through the position and amplitude of a magneto-optical resonance obtained in a paraffin-coated sensor cell containing Rb vapors. A pump-probe scheme was used to prepare a high-contrast magneto-optical resonance. Different possible geometries related to this concept are discussed, including sensor miniaturization.