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Magnetic encoders comprise a magneto-resistive sensor and a multi-pole magnetic scale. They are applicable under a harsh environment. The purpose of this study is to design and fabricate high quality magnetic remanence, both field strength and waveform, out of a magnetic scale aiming to a great improvement in resolution. However, magnetization study of multi-pole magnetic scale is few. Some factors...
Working as an important part in the modern electronic system, Y3Fe5O12 (YIG) is widely used in the fabrication of microwave devices because of its narrow line width. Since its discovery, doped YIG has been studied to satisfy all kinds of applications such as circulators, gyrators, phase shifters and filters. Early studies demonstrate that different ions in Fe3+ ion substitution have different impacts...
In recent decades, magnetodielectric (MD) materials have attracted a great deal of interest for both their unique physical properties as well as their potential as enabling materials in such applications as memory devices, electric field-controlled microwave resonance devices, etc.[1]. The magneto-electric effect has been observed in nature for very few single-phase materials, but many multiphase...
Due to their large conversion between magnetic and electrical energy at room temperature, multiphase magnetoelectric or multiferroic materials have received considerable attention from the Spintronics' community.[1] The multiferroic composites or heterostructures are considered to have great potential use for next generation multifunctional devices such as sensors, transducers, filters, high frequency...
Recently, due to the short supply of rare earth element, there is a great demand in developing the rare-earth-free permanent magnets with giant magnetic anisotropy. Among the rare-earth-free permanent magnetic materials of current interest, MnxGa alloys are potential candidates as permanent magnets [1]. In the MnxGa alloys, the ferromagnetic L10-MnGa phase and ferrimagnetic D022-Mn-3Ga phase are theoretically...
MnGa compounds possess several fascinating and useful properties, such as a large magnetocrys-talline anisotropy Ku, a high spin polarization P, a high Curie temperature TC and a flexible magnetization M. These results suggest that MnGa compounds are of potential candidates for spin-transfer-torque and rare-earth-free permanent magnet applications [1-2]. There are two most interesting tetragonal phases,...
This paper investigates the armature reaction field and inductance feature of the hybrid excitation synchronous machine (HESM) with magnetic shunting rotor and brushless field excitation. It is shown that introduction of excitation winding has a significant effect on armature reaction of the HESM. Inductance feature is determined by the saturation of both axial and radial flux path which vary with...
Due to simple and robust configuration, and without any coils and magnets on movers, a tubular linear switched reluctance actuator (TLSRA) is a promising candidate for applications of frequently reciprocating linear motion, such as linear compressors and automotive active suspension sys-tems[1-2]. For air-gap in a TLSRA, there are the longitudinal and transverse magnetic paths due to various mover...
The Joule Balance is one of the several promising methods for the precise measurement of the Planck constant h to redefine the kilogram. Compared with the Watt Balance, it benefits from its all static measurements. For the new generation of the Joule balance, a magnet system with high-permeability material is designed to reduce the problem of coil heating. Simulations are carried out to demonstrate...
The Hefei Light Source upgrade project (HLS-II) contains 8 dipoles, 32 quadrupoles (2 spares), and 32 sextupoles (2 spares) for the storage ring. Magnets were manufactured and magnetic measurements were performed in collaboration with the Institute of High Energy Physics (IHEP), China. Magnet production and validation measurements were finished in December of 2012. Measurements for all quadrupole...
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