Magnetic probe factor with consideration of probe tilt for near-field measurement
This paper presents a frequency and space dependent analytical model of near-field magnetic probe factor with probe tilt angle for measuring electromagnetic emissions. The principle and derivation of the probe factor are elucidated. The vector-network-analyzer (VNA) measurement of the probe factor is also introduced. The correlation between the measured and calculated probe factors is finally demonstrated.
The Use of Exponential Transmission Lines in Microwave Components
C. Pa~ameter d—Refeyence Plane Shift in Main .4 ~m Here the recommendation to be made is a hybrid one. The IBM experimental data is considered the most reliable. The MRI experimental data appears to yield a value somewhat smaller than expected. For ZoI/Zoz 1.0 and for all values of 2D@ use “lVfodified M RI Theory, ” which requires that d be computed from equivalence relation 4a) of Table II 1, where XJZO is given by (3). A fair prediction of the value of this parameter should be obtained by utilizing the above procedure except possibly in the particular region where 2D1/h >0.7 and ZO1/ZOZ >1.0. In this region only a helpful upper bound is available.
Photoinduced spin-state transition of Co3+ in the layered perovskite manganite thin film
The photoinduced effect, at different temperatures, on layered perovskite manganite La1.2Sr1.8Mn1.8Co0.2O7 thin film deposited on a SrTiO3(100) substrate has been studied using a He–Ne laser (632.8 nm) with the power of output 25 mW at low temperatures. The electrical transport and magnetic properties of the film are investigated systematically in the temperature region from 20 to 300 K. The resistance shows a significant decrease at low temperatures (T<90 K) under laser irradiation, which can be interpreted in terms of the spin-state transition of Co3+ ions. The magnetic field combined with the laser is also used to detect the photoinduced effect of the spin-glass state. The time dependence of the metastable system under several applied fields was also discussed. The system has the ability to keep a persistent memory of the magnetic history imprinted in its zero-field resistance.