TY JOUR TI Ponderomotive Forces. 2. Magnetics and Nonlinear Materials KW ponderomotive forces KW magnetics KW nonlinear materials KW thermodynamics JO Physics in Higher Education AU Maksimychev, A.V. AU Menshikov, L.I. AU Men'shikov, P.L. AU Senchenkov, S.A. PY 2025 IS PB Moscow Physical Society