Publication Date:
2018-04-19
Description:
Author(s): K. Kimura, M. Toyoda, P. Babkevich, K. Yamauchi, M. Sera, V. Nassif, H. M. Rønnow, and T. Kimura A material with broken space-inversion and time-reversal symmetries can exhibit symmetry-dependent unique phenomena such as the magnetoelectric effect. Ferroic order of magnetic quadrupoles fulfills this symmetry condition. The authors report here the discovery of ferroic magnetic quadrupole order and its magnetoelectric activity in the novel compound Pb(TiO)Cu 4 (PO 4 ) 4 , which is in contrast with isostructural Ba(TiO)Cu 4 (PO 4 ) 4 and Sr(TiO)Cu 4 (PO 4 ) 4 in exhibiting antiferroic quadrupole order. Their first-principles calculations reveal that s 2 electrons in Pb 2 + ions alter specific magnetic interactions and consequently switch the quadrupole order from antiferroic to ferroic. This result provides not only an opportunity to explore magnetoelectric phenomena arising from magnetic quadrupoles, but also a useful way of fine-tuning magnetic interactions with s 2 electrons. [Phys. Rev. B 97, 134418] Published Wed Apr 18, 2018
Keywords:
Magnetism
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
