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From MTS Sensors
Magnetostriction is a property of ferromagnetic materials such as iron, nickel, and cobalt. When placed in a magnetic field, these materials change size and/or shape (Figure 2). This physical response of a ferromagnetic material is due to the pres-ence of magnetic moments, and can be understood by considering the material as a collection of tiny permanent magnets, or domains. Each domain consists of many atoms. When a material is not magnetized, the domains are randomly arranged. When the material is magnetized, the domains are oriented with their axes approximately parallel to one another. Interaction of an external magnetic field with the domains causes the magnetostrictive effect. Products & Services
Ferrite ceramics and ferromagnetic materials have dielectric and magnetic properties that are suitable for RF and microwave applications. They provide high electrical resistivity and low magnetic losses.
Industrial magnets are manufactured for industrial use. They include individual magnets, bulk magnet materials, magnetic assemblies, magnetic sweepers, magnetic lifts, magnetic sheet handlers, magnetic retrievers, and permanent / electromagnet combinations.
Magnetic field instruments include meters, gauges, recorders and other instrumentation for the measurement of magnetic fields and/or magnetic flux.
Magnetostrictive position sensors are non-contact linear position sensors that use the momentary interaction of two magnetic fields to produce a strain pulse that moves along a waveguide. One field is from a magnet that moves along the outside of the waveguide. The other field is from the waveguide itself.
Magnetoresistive random access memory (MRAM) stores bits of data by using magnetic charges. MRAM is designed for high density, high speed, non-volatile devices and has the potential to replace DRAM and Flash (EEPROM) memory.
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Topics of Interest
Permanent magnet materials are believed to be composed of small regions or "domains" each of which exhibit a net magnetic moment. An unmagnetized magnet will possess domains that are randomly oriented...
(Read More)
Residual stress is commonly measured with X-ray diffraction and magnetic (magnetoelastic, micromagnetic) or Barkhausen noise techniques. The strain from the residual stress alters the atom spacing in...
(Read More)
Holding Magnets develop high attraction forces to flat magnetic materials. They are used to pick up or hold magnetic materials, and find application in applications ranging from holding of...
(Read More)
6.2 Motor Morphologies
There are, of course, many ways of building permanent magnet motors.
However, only a few will be considered in this section. Actually, once
these are understood, rating...
(Read More)
Cobalt-based super alloys are non-ferrous magnetic alloys with high strength and toughness, excellent corrosion and oxidation resistance, and high temperature strength – all key qualities for a...
(Read More)
Technical Articles
Magnetostriction in Automotive Position Measurement (.pdf)
- Linear Position Sensing
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