Magnetic Bragg peak
= Magnetic Bragg peak
A <magnetic Bragg peak> is an elastic diffraction peak from periodic ordered magnetic moments. A single ordering <wavevector> $\mathbf q$ shifts chemical reciprocal vectors to $\mathbf G\pm\mathbf q$; the basis <structure factor>, <magnetic form factor> and moment component perpendicular to the neutron <momentum transfer> can impose additional extinctions. An allowed translation condition alone does not guarantee visible intensity.