Investigation of Nearly Perfect Magnetic Single Crystals by Means of Neutron Diffraction

摘要

Results from some neutron diffraction experiments with crystals of DyFeO sub 3 are reported. Neutrons of appropriate wavelength (1.26 A) were reflected by a perfect Si crystal monochromator. In most experiments the wavelength used was 1.26 A, the second crystal was to be placed in two different positions, the distance between the first and second crystal being about 6 meters for position 2 and about 7 meters for position 1. Position 2 provided the possibility of applying a magnetic field to the 2 crystal. The intensities of the reflected and transmitted beams were measured by two water- and cadmium-shielded neutron detectors. The magnetic structure of DyFeO sub 3 leads to the fact, that there are two classes of Bragg reflection, namely one of pure nuclear and another of pure magnetic origin. (Atomindex citation 10:477940)