Effects of the chemical composition of the magnetostrictive phase on the dielectric and magnetoelectric properties of cobalt ferrite–barium titanate composites

ABSTRACTNanocomposites formed by ferrimagnetic and ferroelectric materials are multiferroic material in which magnetoelectric coupling occurs via piezoelectricity and magnetostriction phenomena. These nanocomposites have a variety of applications in tunable microwave devices using electric control of spin wave propagation or new magnetic memories in which the magnetic response is controlled by electric field.In this work, transparent and homogeneous thin films of barium titanate interleaved with cobalt ferrite were prepared by sol–gel method using dip-coating process. Films of pure barium titanate and cobalt ferrite were also prepared for comparison. The nanocomposite films were deposited onto clean quartz substrates, where a coating of each material was deposited interleaved, where the cobalt ferrite film formed the last layer. The films were dried in air after each dipping and heated at 900 oC for 1 hour to convert the amorphous films into crystalline ones. The samples were characterized by low angle X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM) and UV-Vis spectroscopy.

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Magnetoelectric effect in cobalt ferrite-barium titanate composites and their electrical properties

Pramana ◽

10.1007/s12043-002-0227-9 ◽

2002 ◽

Vol 58 (5-6) ◽

pp. 1115-1124 ◽

Cited By ~ 62

Author(s):

RP Mahajan ◽

KK Patankar ◽

MB Kothale ◽

SC Chaudhari ◽

VL Mathe ◽

...

Keyword(s):

Electrical Properties ◽

Barium Titanate ◽

Cobalt Ferrite ◽

Magnetoelectric Effect

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The Direct and the Converse Magnetoelectric Effect in Multiferroic Cobalt Ferrite-Barium Titanate Ceramic Composites

Journal of the American Ceramic Society ◽

10.1111/jace.14362 ◽

2016 ◽

Vol 99 (11) ◽

pp. 3623-3631 ◽

Cited By ~ 24

Author(s):

Morad Etier ◽

Vladimir V. Shvartsman ◽

Soma Salamon ◽

Yanling Gao ◽

Heiko Wende ◽

...

Keyword(s):

Barium Titanate ◽

Cobalt Ferrite ◽

Magnetoelectric Effect ◽

Ceramic Composites ◽

Barium Titanate Ceramic ◽

Titanate Ceramic

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Synthesis and magnetoelectric properties of multiferroic composites of lead lanthanum zirconate titanate and mesoporous cobalt ferrite

Scripta Materialia ◽

10.1016/j.scriptamat.2017.04.003 ◽

2017 ◽

Vol 136 ◽

pp. 29-32 ◽

Cited By ~ 12

Author(s):

Ding Ai ◽

Jianmei Xu ◽

Can Huang ◽

Wei Zhou ◽

Ling Zhao ◽

...

Keyword(s):

Cobalt Ferrite ◽

Lead Lanthanum Zirconate Titanate ◽

Lanthanum Zirconate ◽

Magnetoelectric Properties ◽

Zirconate Titanate

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Green Synthesis of Co-Zn Spinel Ferrite Nanoparticles: Magnetic and Intrinsic Antimicrobial Properties

Materials ◽

10.3390/ma13215014 ◽

2020 ◽

Vol 13 (21) ◽

pp. 5014

Author(s):

Alexander Omelyanchik ◽

Kateryna Levada ◽

Stanislav Pshenichnikov ◽

Maryam Abdolrahim ◽

Miran Baricic ◽

...

Keyword(s):

Magnetic Properties ◽

Magnetic Nanoparticles ◽

Chemical Composition ◽

Saturation Magnetization ◽

Cobalt Ferrite ◽

Spinel Ferrite ◽

Ferrite Nanoparticles ◽

Ferromagnetic Behavior ◽

Wide Range ◽

Auto Combustion

Spinel ferrite magnetic nanoparticles have attracted considerable attention because of their high and flexible magnetic properties and biocompatibility. In this work, a set of magnetic nanoparticles of cobalt ferrite doped with zinc was synthesized via the eco-friendly sol-gel auto-combustion method. Obtained particles displayed a room-temperature ferromagnetic behavior with tuned by chemical composition values of saturation magnetization and coercivity. The maximal values of saturation magnetization ~74 Am2/kg were found in cobalt ferrite nanoparticles with a 15–35% molar fraction of cobalt replaced by zinc ions. At the same time, the coercivity exhibited a gradually diminishing trend from ~140 to ~5 mT whereas the concentration of zinc was increased from 0 to 100%. Consequently, nanoparticles produced by the proposed method possess highly adjustable magnetic properties to satisfy the requirement of a wide range of possible applications. Further prepared nanoparticles were tested with bacterial culture to display the influence of chemical composition and magnetic structure on nanoparticles-bacterial cell interaction.

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