Complex interplay between 3d and 4f magnetic systems and magnetic chirality in multiferroic Dy$_{1-x}$Ho$_x$MnO$_3$ ($x = 0, 0.2$)

arXiv (Cornell University)

Abstract

Structural, magnetic and multiferroic properties of single crystals of Dy$_{1-x}$Ho$_x$MnO$_3$ ($x = 0, 0.2$) were investigated by the different methods of polarized and classical neutron diffraction and macroscopic methods in order to determine the effect of Ho doping on the magneto-electric behavior of the title compounds. It is shown that substitution by Ho of 20% on the position of Dy do not change overall crystal symmetry of compound. It remains of Pnma type for both compositions down to the very low temperatures. Magnetic ordering do not change the crystal structure. Precise magnetic order and it detailed temperature and field evolution both in the pristine and substituted compounds we determined using single crystal neutron diffraction and magnetization measurements. The results show a complex interplay between transition metal and rear earth magnetic sub lattices leading to so-called "Mn-controlled" and "Dy-controlled" magnetic states. Using polarized neutron diffraction 3D character of rear earth magnetic order in Dy$_{0.8}$Ho$_{0.2}$MnO$_3$ in contract to DyMnO$_3$ and occurrence of the chiral type magnetic structure on Mn subsystem could be revealed. The influence of the external electric field on the magnetic chirality could be directly evidenced, proving strong magneto-electric coupling in multiferroic phase. The study of the electric polarization under similar temperatures and fields on the same samples provides the direct correlation between the results of the microscopic and macroscopic investigations.

Authors 11

1. A. N. Matveeva

   Kurchatov Institute · Petersburg Nuclear Physics Institute

   Affiliation as printed

   Petersburg Nuclear Physics Institute by B.P . Konstantinov of NRC «Kurchatov Institute» , 188300 Gatchina , Russia

2. И. А. Зобкало

   Kurchatov Institute · Petersburg Nuclear Physics Institute

   Affiliation as printed

   Petersburg Nuclear Physics Institute by B.P . Konstantinov of NRC «Kurchatov Institute» , 188300 Gatchina , Russia

3. A. Sazonov Aachen Institute of Crystallography

   European Spallation Source · Heinz Maier-Leibnitz Zentrum · RWTH Aachen University

   Affiliation as printed

   Institute of Crystallography , RWTH Aachen University and Jülich Centre for Neutron Science at Heinz Maier-Leibnitz Zentrum , Garching , Germany

   Сurrent affiliation: ESS Data Management & Software Centre (DMSC) , 2200 Copenhagen , Denmark

4. M. Meven Aachen Institute of Crystallography

   Heinz Maier-Leibnitz Zentrum · RWTH Aachen University

   Affiliation as printed

   Institute of Crystallography , RWTH Aachen University and Jülich Centre for Neutron Science at Heinz Maier-Leibnitz Zentrum , Garching , Germany

5. A. L. Freidman

   Institute of Physics · Siberian Federal University

   Affiliation as printed

   Kirensky Institute of Physics , Federal Research Center , Krasnoyarsk 660036 , Russia

6. S. V. Semenov

   Institute of Physics · Siberian Federal University

   Affiliation as printed

   Kirensky Institute of Physics , Federal Research Center , Krasnoyarsk 660036 , Russia

7. M. I. Kolkov

   Institute of Physics · Siberian Federal University

   Affiliation as printed

   Kirensky Institute of Physics , Federal Research Center , Krasnoyarsk 660036 , Russia

8. K. Yu. Terentjev

   Institute of Physics · Siberian Federal University

   Affiliation as printed

   Kirensky Institute of Physics , Federal Research Center , Krasnoyarsk 660036 , Russia

9. N. S. Pavlovskiy

   Institute of Physics · Siberian Federal University

   Affiliation as printed

   Kirensky Institute of Physics , Federal Research Center , Krasnoyarsk 660036 , Russia

10. K. A. Shaykhutdinov

    Institute of Physics · Siberian Federal University

    Affiliation as printed

    Kirensky Institute of Physics , Federal Research Center , Krasnoyarsk 660036 , Russia

11. Vladimir M. Hutanu Aachen Institute of Crystallography

    Heinz Maier-Leibnitz Zentrum · Isotopen Technologien München (Germany) · Technical University of Munich · RWTH Aachen University

    Affiliation as printed

    Institute of Crystallography , RWTH Aachen University and Jülich Centre for Neutron Science at Heinz Maier-Leibnitz Zentrum , Garching , Germany

    Сurrent affiliation : Technical University of Munich , ZWE FRM II , 85748 Garching , Germany