Directivity and sensitivity of high-frequency carrier type thin-film magnetic field sensor

Giant Magnetoimpedance of Cube/Feconi Electroplated Wires: Focus on Angular Sensoric

“…This differs the FeCoiNi/CuBe electrodeposited wire investigated in present work from previously reported data on GMI sensors with flat geometry (thin film or amorphous/nanocrystalline ribbon based sensitive elements) [21,22] for which GMI responses are not or not sufficiently sensitive in the case of the angles α < 60˚ and especially α < 30˚.…”

“…These studies are especially limited in case of the electroplated wires [19] which, in contrast with rapidly quenched amorphous ribbons [20] or thin films [21] as it will be proved here show certain advantages.…”

Wide-angle magnetoimpedance field sensor based on two crossed amorphous ribbons

“…Magnetic field features oriented along the longitudinal direction of a plate shape sensor element was first analysed by Yamaguchi et al [14]. These authors also made a calculation of the effective field intensity for a rectangular magnetic body by finite elements method founding that the effective field intensity is not always equal to H cos(α) due to the demagnetizing fields at the body edges.…”

“…Descriptions of different MI-based field sensor prototypes are widely available in the literature together with their advantages, disadvantages and comparative analysis of MI sensors with other types of magnetic detectors [3,[8][9][10][11]. Although many attempts have been made in order to study the angular dependence of the MI on the application of the external magnetic field in different materials [9,[12][13][14][15], at the same time, these data are still non-systematic and they are mainly focused more on the material properties than on the design of a particular magnetic field sensor prototype [11].…”

“…The experimental data in both above mentioned cases are related to amorphous ribbons with specific induced transverse magnetic anisotropy, which is favourable for obtaining a high MI response, and particularly, high MI sensitivity with respect to applied magnetic field in the low field interval [1,9]. Yamaguchi et al [14] have studied the dependence of total impedance as well as resistance and the reactance variations in the external static field applied under different angles to the plane of rectangular thin film sensitive element. Both, weak and strong angular dependencies are useful for sensor applications, but each one can be used for designing different kind of magnetic sensors: non-oriented field sensors in the first and position/displacement sensors in the second case.…”