Magnetic force microscope ~MFM! imaging in conjunction with longitudinal Kerr hysteresis loop measurements have been used to investigate the micromagnetic behavior of micron scale epitaxial ~110! bcc Fe thin-film elements ~50-nm thick! with rectangular, triangular, and needle-shaped ends and competing magnetic anisotropies. Thin-film elements of 2-mm width and 6-mm length and greater have been ...

As a new type of smart material, magnetic shape memory alloy has the advantages of a fast response frequency and outstanding strain capability in the field of microdrive and microposition actuators. The hysteresis nonlinearity in magnetic shape memory alloy actuators, however, limits system performance and further application. Here we propose a feedforward-feedback hybrid control method to impr...

The phenomena of superheating and supercooling can lead to a thermal hysteresis curve where two states are stable over a range of temperatures. Here we present a simple magnetic multilayer system (Fe/Gd) that can be designed to show a thermal hysteresis curve. Calculations show that, with proper choice of parameters, the width, in temperature, of the hysteresis curve can be controlled by an ext...

We report on the magnetic-field-induced variations of the microwave surface resistance, Rs, in a polycrystalline MgB2 sample, at different values of temperature. We have detected a magnetic hysteresis in Rs, which exhibits an unexpected plateau on decreasing the DC magnetic field below a certain value. In particular, at temperatures near Tc the hysteresis manifests itself only through the prese...

Introduction The models of magnetic devices having a magnetic core without known parameters require the core evaluation by means of sophisticated measurement procedures and systems. For certain models, higher measurement accuracy is of key importance. For the other models, additional factors (speed, cost, measurement instruments and apparatus) may strongly limit achievement of the specific meas...

2014 A brief survey is made of some of the problems involved in the development of experimental methods of obtaining information on the domain processes involved in the low field magnetization of polycrystalline materials. LE JOURNAL DE PHYSIQUE ET LE RADIUM TOME 20, FÉVRIER 1959, This paper represents an attempt to summarise briefly some of the problems involved in the development of an unders...