scispace - formally typeset
Search or ask a question
Topic

Magnetic core

About: Magnetic core is a research topic. Over the lifetime, 30011 publications have been published within this topic receiving 155247 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: A novel kind of magnetic core/mesoporous silica shell nanospheres with a uniform particle diameter of ca.
Abstract: A novel kind of magnetic core/mesoporous silica shell nanospheres with a uniform particle diameter of ca. 270 nm was synthesized. The inner magnetic core endues the whole nanoparticle with magnetic properties, while the outer mesoporous silica shell shows high enough surface area and pore volume. The synthesized material is expected to be applied to targeted drug delivery and multiphase separation. The storage and release of ibuprofen into and from the pore channels of the mesoporous silica shell, as a typical example, are demonstrated.

720 citations

Journal ArticleDOI
01 Sep 1942
TL;DR: In this article, the skin effect is used to determine the surface resistivity of conductors at a wide range of frequency bands, including those of wires, transmission lines, and coils.
Abstract: At radio frequencies, the penetration of currents and magnetic fields into the surface of conductors is governed by the skin effect. Many formulas are simplified if expressed in terms of the "depth of penetration," which has merely the dimension of length but involves the frequency and the conductivity and permeability of the conductive material. Another useful parameter is the "surface resistivity" determined by the skin effect, which has simply the dimension of resistance. These parameters are given for representative metals by a convenient chart covering a wide range of frequency. The "incremental-inductance rule" is given for determining not only the effective resistance of a circuit but also the added resistance caused by conductors in the neighborhood of the circuit. Simple formulas are given for the resistance of wires, transmission lines, and coils; for the shielding effect of sheet metal; for the resistance caused by a plane or cylindrical shield near a coil; and for the properties of a transformer with a laminated iron core.

679 citations

Patent
24 Sep 1999
TL;DR: In this article, a core of magnetic material is disposed for movement within a bobbin about which a coil of insulated, electrically conductive wire is wound, and at least one Hall effect device is disposed about the coil.
Abstract: A sensor for measuring linear displacement has a core of magnetic material disposed for movement within a bobbin about which a coil of insulated, electrically conductive wire is wound. At least one Hall effect device is disposed about the coil. The sensor is contained with a magnetic housing. When the coil is excited by a DC power source, the direction of magnetic flux flowing through the Hall effect device is dependent upon the position of the core.

539 citations

Book
01 Jan 1969
TL;DR: Ferrites - their nature, preparation and processing the expression of electrical and magnetic properties properties of some manganese zinc and nickel zinc ferrites magnetic circuit theory inductors high frequency inductors wide band transformers pulse transformers and inductors power transformers.
Abstract: Ferrites - their nature, preparation and processing the expression of electrical and magnetic properties properties of some manganese zinc and nickel zinc ferrites magnetic circuit theory inductors high frequency inductors wide band transformers pulse transformers and inductors power transformers and inductors ferrite antennas properties of windings.

533 citations


Network Information
Related Topics (5)
Electromagnetic coil
187.8K papers, 1.1M citations
88% related
Voltage
296.3K papers, 1.7M citations
86% related
Capacitor
166.6K papers, 1.4M citations
84% related
Rotor (electric)
179.9K papers, 1.2M citations
84% related
Electric power system
133K papers, 1.7M citations
80% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202365
2022163
2021309
2020900
20191,254
20181,426