In 1934, Altshuler and Tamm published a famous article which predicted the existence of the magnetic moment of neutron and correctly estimated its value and sign.

[7] In 1934, Altshuler was recalled to Kazan by Evgeny Zavoisky who offered him a position of lecturer and a chair of the theoretical physics group.

He returned to Kazan University in 1946, to work on the phenomenon of electron paramagnetic resonance (EPR), newly discovered by Zavoisky.

This finding had great practical impact as it allowed detection of nuclei through resonance absorption by electrons.

Although Zavoisky left the group in 1947 to work in nuclear physics in Moscow, he continued generating new ideas in the area of electron resonance.