About tank mines, something at the end of the following site:
SOVIET TM 35 and TM 38 antitank-mines (Tankovaja Mina 35 / Tankovaja Mina 38): Finnish Army cleared huge number of these antitank-mines from Soviet minefields during Continuation War. Reportedly large number of the mines captured in this way were reused in Finnish minefields.
FINNISH ARMY 1918 - 1945: LANDMINES PART 3
TM-38 mine - Wikipedia, the free encyclopedia
For the magnetic mines must admit haven´t found anything as I was wondering last year what the Zimmerit was made for...perhaps there was no Red Army´s own magnetic AT mine (?).