Magnetic structure and orbital ordering in KCrF3 perovskite

Physics – Condensed Matter – Strongly Correlated Electrons

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Scientific paper

KCrF3 represents another prototypical orbital-ordered perovskite, where Cr2+ possesses the same electronic configuration of 3d4 as that of strongly Jahn-Teller distorted Mn3+ in many CMR manganites. The crystal and magnetic structures of KCrF3 compound are investigated by using polarized and unpolarized neutron powder diffraction methods. The results show that the KCrF3 compound crystallizes in tetragonal structure at room temperature and undergoes a monoclinic distortion with the decrease in temperature. The distortion of the crystal structure indicates the presence of cooperative Jahn-Teller distortion which is driven by orbital ordering. With decreasing temperature, four magnetic phase transitions are observed at 79.5, 45.8, 9.5, and 3.2 K, which suggests a rich magnetic phase diagram. Below T_N = 79.5 K, the Cr2+ moment orders in an incommensurate antiferromagnetic arrangement, which can be defined by the magnetic propagation vector (1/2$\pm\,$$\delta\,$, 1/2$\pm\,$$\delta\,$, 0). The incommensurate-commensurate magnetic transition occurs at 45.8 K and the magnetic propagation vector locks into (1/2, 1/2, 0) with the Cr moment of 3.34(5) $\mu_B \,$ aligned ferromagnetically in (220) plane, but antiferromagnetically along [110] direction. Below 9.5 K, the canted antiferromagnetic ordering and weak ferromagnetism arise from the collinear antiferromagnetic structure, while the Dzyaloshinskii-Moriya interaction and tilted character of the single-ion anisotropy might give rise to the complex magnetic behaviors below 9.5 K.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Magnetic structure and orbital ordering in KCrF3 perovskite does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Magnetic structure and orbital ordering in KCrF3 perovskite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic structure and orbital ordering in KCrF3 perovskite will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-28101

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.