  Neutron diffraction measurements on a single crystal of CeGe1.76 reveal a
complex series of magnetic transitions at low temperature. At T_N = 7 K, there
is a transition from a paramagnetic state at higher temperature to an
incommensurate magnetic structure characterized by a magnetic propagation
vector (0 0 tau) with tau approx. 1/4 and the magnetic moment along the a axis
of the orthorhombic unit cell. Below T_LI = 5 K, the magnetic structure locks
in to a commensurate structure with tau = 1/4 and the magnetic moment remains
along the a axis. Below T* = 4 K, we find additional half-integer and integer
indexed magnetic Bragg peaks consistent with a second commensurately ordered
antiferromagnetic state.
