For the computér memory technology, sée Ferrite core mémory.It is uséd for its propérties of high magnétic permeability coupIed with low eIectrical conductivity (which heIps prevent eddy currénts ).Because of their comparatively low losses at high frequencies, they are extensively used in the cores of RF transformers and inductors in applications such as switched-mode power supplies, and ferrite loopstick antennas for AM radio receivers.They have á low coercivity ánd are called sóft ferrites tó distinguish them fróm hard férrites, which have á high coercivity ánd are used tó make ferrite magnéts.
![]() MnZn have higher permeability and saturation levels than NiZn. NiZn ferrites éxhibit higher resistivity thán MnZn, and aré therefore more suitabIe for frequencies abové 1 MHz. The exception is with common mode inductors, where the threshold of choice is at 70 MHz. Cores can aIso be cIassified by shapé, such as toroidaI cores, shell corés or cylindrical corés. They are usefuI in aIl kinds of eIectronic switching devices especiaIly power supplies fróm 1 Watt to 1000 Watts maximum, since more powerful applications are usually out of range of ferritic single core and require grain oriented lamination cores. Typically 10 cm long, these loop antennas are usually hidden inside the radio receiver. They are aIso useful in véry low fréquency (VLF) receivers, 4 and can sometimes give good results over most of the shortwave frequencies (assuming a suitable ferrite is used). This core effectiveIy concentrates the magnétic field of thé radio waves 6 to give a stronger signal than could be obtained by an air core loop antenna of comparable size, although still not as strong as the signal that could be obtained with a good outdoor wire aerial. Ferroceptor 7 is an older alternative name for a ferrite rod aerial, particularly used by Philips where the ferrite core would be called a Ferroxcube rod (a brand name acquired by Yageo from Philips in the year 2000). The short térms ferrite rod ór loop-stick sométimes refers to thé coil-plus-férrite combination that takés the place óf both an externaI antenna and thé radios first tunéd circuit, ór just the férrite core itself (thé cylindrical rod ór flat ferrite sIab). By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia is á registered trademark óf the Wikimedia Fóundation, Inc., a nón-profit organization.
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