Distribution of the Magnetic Field in the Gap between Two Permanent Magnets: Calculated and Experimental Data and Their Applications

• Published in: Instruments and experimental techniques (New York) Vol. 66; no. 6; pp. 995 - 1002
• Main Authors: Osipov, V. V., Orlov, A. N., Lisenkov, V. V., Maksimov, R. N., Shitov, V. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.12.2023; Springer Nature B.V
• Subjects: Electrical Engineering; General Experimental Technique; Inhomogeneity; Magnetic fields; Mathematical analysis; Measurement Science and Instrumentation; Neodymium; Permanent magnets; Physical Chemistry; Physics; Physics and Astronomy; Verdet constant
• ISSN: 0020-4412; 1608-3180
• DOI: 10.1134/S0020441223060064

Theoretical and experimental studies of the magnetic field distribution in the space between two cylindrical permanent magnets with through holes in the center have been carried out. In the middle of a space measuring 2 × 2 × 2 mm 3 near the symmetry axis, a magnetic field with an inhomogeneity of no more than 3% was found and one in the region of 1 × 1 × 1 mm 3 with less than 1% was found. Based on the calculated and experimental results, a setup for determining the Verdet constant (V) using neodymium permanent magnets was developed and manufactured. The magneto-optical constants for samples of optical ceramics from Tb 2 O 3 and Tb 3 Ga 5 O 12 at wavelengths of 0.628 and 1.06 µm are determined.