MAGNETIC OPTICAL THIN FILM, MAGNETIC OPTICAL DEVICE AND MAGNETIC FIELD SENSOR

摘要

To provide a magnetic optical device, a magnetic field sensor and a magnetic optical thin film which enable the increase in accuracy of magnetic field measurement.SOLUTION: A magnetic optical thin film 10 of the present invention comprises metal particles 12 dispersed in an insulating matrix 11, which is represented by the following composition formula: FeCoNiMNOF, where M is at least one element selected from a group consisting of Li, Be, Mg, Al, Si, Ca, Sr, Ba, Bi, Ti, a rare earth element, Zr, Nb, Hf and Ta. The composition ratios a, b, c, w, x, y and z are atomic proportions which satisfy 0≤a≤0.30, 0≤b≤0.30, 0≤c≤0.30, 0.10≤a+b+c≤0.30, 0.20≤w≤0.30, 0≤x≤0.70, 0≤y≤0.70, 0≤z≤0.70, 0.40≤x+y+z≤0.70 and a+b+c+w+x+y+z=1. The metal particles 12 have an average particle diameter in a range of 2-10 [nm], and an average particle distance in a range of 1.0-5.0 [nm].SELECTED DRAWING: Figure 1