Faraday rotation of cobalt ferrite nanoparticle polymer composite films at cryogenic temperatures

Veysi Demir; Palash Gangopadhyay; Robert A Norwood; Nasser Peyghambarian

doi:10.1364/AO.53.002087

Faraday rotation of cobalt ferrite nanoparticle polymer composite films at cryogenic temperatures

Appl Opt. 2014 Apr 1;53(10):2087-92. doi: 10.1364/AO.53.002087.

Authors

Veysi Demir, Palash Gangopadhyay, Robert A Norwood, Nasser Peyghambarian

PMID: 24787165
DOI: 10.1364/AO.53.002087

Abstract

This paper investigates the behavior of the Verdet constant for cobalt ferrite (CoFe₂O₄) nanoparticles polymer composite films at low temperatures using a 532 nm laser source. An experimental setup for Faraday rotation (FR) at low temperatures is introduced and FRs were measured at various temperatures. Verdet constants were deduced from the paramagnetic model for terbium gallium garnet glass where ~4× improvement was observed at 40° K for CoFe₂O₄ composite film.