RMn2O5 (R = Y and rare earth) shows successive magnetic and ferroelectric phase transitions at about 45 K, 40 K, 39 K, 20 K and 10 K and is called a multiferroic compound. We have investigated the lattice modulation vectors (qL) of YMn2O5 and TbMn 2O5 by using single crystal Synchrotron Radiation X-ray diffraction and compared them with the magnetic propagation vectors (q M) studied by neutron diffraction. The relation of the propagation vectors between magnetic materials and dielectrics is found to be qL, = 2qM. A preliminary structure analysis of the atomic displacement pattern in the commensurate ferroelectric phase of TbMn2O5 is discussed.
|Number of pages||4|
|Journal||Journal of the Korean Physical Society|
|Issue number||2 PART I|
|Publication status||Published - Aug 1 2007|
- SR X-ray diffraction
ASJC Scopus subject areas
- Physics and Astronomy(all)