INVESTIGATION OF THE MAGNETIC-STRUCTURE OF HOLMIUM BY THE MUONIC METHOD

The possibility of investigating by the muonic method spin-incommensur ate helicoidal structures of rare-earth magnets is examined for the ex ample of holmium. It is shown that at temperatures 20 K <T<130 K only one precession frequency of the muon spin is observed in holmium; this is characteristic for a simple helicoidal structure. The broadening o f the frequency spectrum increases sharply at temperatures T less than or equal to 20 K, possibly as a result of the appearance of spin-slip structure at these temperatures. The Fermi contact magnetic field of the conduction electrons of holmium at a muon is measured. (C) 1997 Am erican Institute of Physics.