Type of Magnetic Field Dependency of AC Susceptibility of Rare Earth Titanates

The nanocomposite artificial crystals with embedded magnetic nanoparticles are obtained from opal matrices composed of the submicron SiO 2 spheres. The introduced particles are sized from 5 to 60 nm. These artificial crystals contain particles of several rare earth titanates with pyrochlore structur...

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Bibliographic Details
Published in:Physics of metals and metallography 2019-12, Vol.120 (13), p.1309-1312
Main Authors: Rinkevich, A. B., Korolev, A. V., Perov, D. V.
Format: Article
Language:English
Subjects:
Chemistry and Materials Science
Crystal structure
Dependence
Earth
Low temperature
Magnetic fields
Magnetic permeability
Magnetic properties
Magnetism
Materials Science
Metallic Materials
Nanocomposites
Nanoparticles
Silicon dioxide
Titanates
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Summary:The nanocomposite artificial crystals with embedded magnetic nanoparticles are obtained from opal matrices composed of the submicron SiO 2 spheres. The introduced particles are sized from 5 to 60 nm. These artificial crystals contain particles of several rare earth titanates with pyrochlore structure. Low temperature magnetic properties of these nanocomposite materials have been investigated. The frequency and magnetic field dependences of AC magnetic susceptibility of nanocomposites with Gd 2 Ti 2 O 7 , Dy 2 Ti 2 O 7 , Sm 2 Ti 2 O 7 , Nd 2 Ti 2 O 7 and Er 2 Ti 2 O 7 particles have been measured in temperature range from 2 to 10 K at frequencies from 1 Hz to 10 kHz. It has been established that magnetic field dependences of these rare earth nanocomposite titanates obey Cole-Cole-like formula written for magnetic field dependency of AC magnetic susceptibility.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X19130246