Abstract
Polar magnets are promising materials for applications such as multiferroics or in spintronics. In double-corundum-related oxides, the cation ordering imposes a polar structure and the use of high pressure facilitates the insertion of magnetic cations into the compounds. Here we present the high-pressure synthesis of a polar and ferrimagnetic corundum derivative of ${\mathrm{Mn}}_{2}{\mathrm{InSbO}}_{6}$, which adopts the ordered-ilmenite-type structure. Neutron powder diffraction reveals that the high-temperature nearly collinear ferrimagnetic phase evolves to an incommensurate helical structure with ${k}_{\ensuremath{\delta}}=[0\phantom{\rule{0.28em}{0ex}}0\phantom{\rule{0.28em}{0ex}}{k}_{z}]$ propagation vector, which then locks to the commensurate value of ${k}_{z}=1/8$. This complex magnetic behavior is likely to be related to magnetic frustration and the polar nature of the ordered double-corundum structure.
Highlights
High pressure and high temperature treatments of ABO3 oxides promote unusual cationic arrangements and interesting physical properties.[1]
We present the high pressure synthesis of a new polar and magnetic double corundum oxide Mn2InSbO6
Rietveld analysis of combined high-resolution synchrotron X-ray (SXRD) and neutron powder (NPD) diffraction data collected at 80 K (Supplementary Fig. S1) revealed that Mn2InSbO6 crystallises in a doublecorundum-type derivative
Summary
High pressure and high temperature treatments of ABO3 oxides promote unusual cationic arrangements and interesting physical properties.[1]. The polar lattice of double corundum-type oxides can stimulate the formation of modulated spin structures via a mechanism described by Lifshitz invariants in a Landau free- energy expansion.[20,21] This gradient energy term favour inhomogeneous magnetic states and is known to result in incommensurate magnetic ground states in MnSi [22] and BiFeO3 [ , ]. Both of these compounds demonstrate rich phase diagrams including magnetic field induced skyrmion lattice [ ] and hightemperature multiferroic properties respectively[26]. The dielectric response was measured on cooling with a Andeen-Hagerling Capacitance bridge at 1 kHz in a closed cycle refrigerator
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
