Magnetic Structure of HoBe(13) in an Applied Magnetic Field
The magnetic structure of HoBe(13) and its evolution under an applied magnetic field have been examined using neutron diffraction techniques on a single crystal. In the absence of an external field this cubic compound orders at T9(N) = 5.7(1) K into a regular helical magnetic structure with propagation vector q = [0,0,1/3].Third order harmonics appear at 4.41(1) K and are attrivuted to a derormation of the spiral structure below this temperature. When a magnetic field is applies along the  axis the magnetic domain with propagation vector parallel to the field is favored, and by about 0.4 Tesla a single domain structure is created. The surprizing discovery was that at higher fields (1.5 T at 1.4 K) and other two domains reappear and become the prefered ones. This reentrant behaviour is due to the appearance of a transverse collinear magnetid structure, with the same propagarion vector [0,0,1/3],which the system prefers at higher fields as the induced ferromagnetic component becomes dominant. On the basis of these results, the magnetic phase diagram of HoBe(13) has been constructed.
Bibliographic Reference: Article: Physical review B 1998
Record Number: 199910218 / Last updated on: 1999-03-12
Original language: en
Available languages: en