Magneto-optical properties of a highly transparent cadmium ferrite-based magnetic fluid

Abstract

The magneto-optical properties of a highly stable ionic magnetic fluid sample containing CdFe2O4 nanoparticles were investigated using static magnetic birefringence, zero-field optical transmissivity, and transmission electron microscopy. From our measurements we found that the transmittivity and the birefringence of the CdFe2O4-based sample is several times greater than a typical magnetic fluid sample (γ-Fe2O3 based), giving this magnetic material great potential for magneto-optics applications. We also found that the birefringence can be increased by several orders of magnitude, allowing full manipulation of the observed negative differential transmitted optical intensity feature.

Magnetic properties of γ-Fe2O3 nanoparticles encapsulated in surface-treated polymer spheres

“…Since γ-Fe 2 O 3 nanocomposites can be useful in biomedical applications, magnetic recording, magnetic refrigeration, magneto-optics and spintronics [1][2][3], the control of their magnetic properties is of great importance to reach the goals imposed by a specific application. γ-Fe 2 O 3 nanoparticles can show characteristic properties such as superparamagnetism, blocking temperature, interparticle interaction, and extra anisotropy contributions, which strongly depend on the history and preparation method and are still not completely understood.…”

Versatile transmission ellipsometry to study linear ferrofluid magneto-optics

“…Both experimental and theoretical work is focused on elucidating the origin of the magneto-optical properties of these suspensions and exploring their applicability as active optical devices [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Initially, the theoretical description of the magneto-optical properties of ferrofluids was based on the alignment of slightly non-spherical particles with uniaxial magnetic anisotropy in an applied magnetic field [9].…”

Morphology, Microstructure, and Magnetic Properties of Ordered Large-Pore Mesoporous Cadmium Ferrite Thin Film Spin Glasses

“…Because cadmium ferrite has potential for use in magneto-optical devices, [21] the optical properties of the thin films were also examined. Optical absorption measurements (see Fig.…”

“…[3,8,18] Cadmium ferrite belongs to the spinel-type oxides with space group 3 ̅ ( magneto-optical devices and as semiconducting sensing material. [19][20][21] In general, spinel ferrites exhibit a variety of interesting electrical, optical, and magnetic properties which is why they are widely used in applications such as magnetic recording. [22][23][24] While single-magnetic cation ferrites, including CdFe 2 O 4 and ZnFe 2 O 4 , seem to be of less interest for such applications, it is known that the physical properties can be effectively tailored through the cation distribution among the octahedral and tetrahedral sites.…”