"Hall effect" for neutrons scattered by an A phase MnSi crystal

TL;DR

This paper investigates a neutron diffraction phenomenon in MnSi crystals, revealing an asymmetrical diffraction pattern dependent on magnetic field direction, analogous to a Hall effect for neutrons.

Contribution

It introduces the concept of a neutron Hall effect in MnSi, demonstrating magnetic field-dependent asymmetry in neutron diffraction using a dynamical diffraction theory.

Findings

Neutron diffraction in MnSi's A phase is asymmetrical.

Asymmetry depends on the magnetic field sign.

The phenomenon is analogous to the Hall effect for neutrons.

Abstract

We study a neutron diffraction by A phase of MnSi using a dynamical theory of diffraction and three wave approximation. We show that the neutron diffraction is asymmetrical with respect to an incident plane. The asymmetry depends on a sign of an external magnetic field. This phenomenon can be considered as the Hall effect for neutrons.