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META

Magnetic relaxation in Cobalt doped Ni-Zn ferrites

Steflea, M.; Bunget, I.; Raican, A.1976

[en] Frequency and temperature dependence of permeability (μ') and magnetic loss factor (tan delta) on cobalt doped ferrites were investigated. It was found that the relaxation occurs only in the presence of Co²⁺ and Co³⁺ ions. The shape of the μ''(μ') diagrams suggests a distribution of the relaxation times. This distribution was found by using a model proposed by Krupicka and Roskovec. As for the relaxation mechanism, the electronic hopping Co²⁺ and Co³⁺ via Fe³⁺ seems to be the most probable one

Primary Subject

CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY (A1300)

Record Type

Journal Article

Journal

Revue Roumaine de Physique; v. 21(1); p. 43-49

Country of publication

Romania

Descriptors (DEI)

ARGAND DIAGRAMS, COBALT ADDITIONS, FERRITES, FREQUENCY DEPENDENCE, MAGNETIC SUSCEPTIBILITY, NICKEL COMPOUNDS, RELAXATION, TEMPERATURE DEPENDENCE, ZINC COMPOUNDS

Descriptors (DEC)

DIAGRAMS, FERRIMAGNETIC MATERIALS, MAGNETIC MATERIALS, MAGNETIC PROPERTIES, PHYSICAL PROPERTIES, TRANSITION ELEMENT COMPOUNDS

Reference NumberReference Number

7269649

INIS VolumeINIS Volume

INIS IssueINIS Issue

META

Physical properties of polycrystalline cadmium sulphide obtained by ceramic technology

Bunget, I.; Leonovici, M.R.; Mihai, V.; Alexandru, H.; Steflea, M.; Ioanid, A.; Popescu, M.1979

AbstractAbstract

[en] An experimental study of several physical properties of polycrystalline cadmium sulphide (CdS) samples obtained by ceramic technology is reported. It has been investigated the influence of pressure in samples preparation, sintering temperature and atmosphere on the structural and electrical properties. (author)

Primary Subject

INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY (B1200)

Source

25 refs.

Record Type

Journal Article

Journal

Revue Roumaine de Physique; ISSN 0035-4090;

; v. 24(1); p. 57-66