Shields

About: Shields is a research topic. Over the lifetime, 1456 publications have been published within this topic receiving 10896 citations.

High moment wrap shields for magnetic read head to improve micro-magnetic read width

Abstract: A magnetically stable, read sensor uses low-coercivity magnetic material without seed layers in side shields for longitudinal biasing in order to improve micro-magnetic read width of the sensor. The sensor is formed between an upper and lower shield and includes a symmetric pair of abutting side shields adjacent to the sides of the sensor. In one configuration the side shields are partially covered by a layer of high magnetic moment material that extends along a bottom surface and side surface of the side shields and is contiguous and conformal with the layer of insulating material, but does not cover the backside of the sensor. The high moment layer focuses flux at the sensor sides and also improves the micro-magnetic read width. The side shields include a multiplicity of horizontal ferromagnetic layers that are antiferromagnetically coupled to each other and magnetically coupled to the upper shield.

Power transformer having flux shields surrounding metallic structural members

Abstract: Structural members projecting from the transformer tank are surrounded by flux shields to prevent leakage flux from entering and heating the structural members. The flux shields are constructed of a non-magnetic material which has relatively good electrical conductivity. Current induced into the flux shield by the leakage flux produces flux which counteracts the leakage flux and reduces heating of the structural members.

Limited-use radiation attenuating shields, liners for radiation attenuating shields and methods

Abstract: Wearable radio-opaque shields may be formed from relatively low-cost materials, which may include a non-toxic radio-opaque material. The use of such materials may render the wearable radio-opaque shields suitable for limited use or even for single use. The useful life of a wearable radio-opaque shield may be extended, and hygiene improved, by way of a liner configured for assembly with the wearable radio-opaque shield. Methods for using and disposing of wearable radio-opaque shields and liners are also disclosed.

High-T/sub c/ superconducting image surface magnetometers

Abstract: We present an overview of the concepts of image surface magnetometry, and analyze various shapes of superconducting shields in the presence of uniform background noise fields and current sources that simulate biomagnetic sources. We show that, for certain geometries and sizes, these shields can selectively shield background noise fields as opposed to signals of interest. We also show that clever use of these shields can, in some cases, allow an undisturbed measurement of the signals of interest while attenuating noise fields by as much as four orders of magnitude. >