Proceedings of the 40 Annual Condensed Matter and Materials Meeting

Neutron diffraction experiments on PrNiAl4 have revealed the presence of a second magnetic phase, in addition to the previously known commensurate magnetic structure. The second phase orders at 8.1 K, is incommensurate with the crystal lattice with propagation vector k = (0.07(1), 1, 0) and has the magnetic moments aligned along the a-axis. The moments also vary sinusoidally along this same direction