학술논문
Rich Magnetic Phase Diagram of Putative Helimagnet Sr$_3$Fe$_2$O$_7$
Document Type
Working Paper
Author
Andriushin, Nikita D.; Grumbach, Justus; Kim, Jung-Hwa; Reehuis, Manfred; Tymoshenko, Yuliia V.; Onykiienko, Yevhen A.; Jain, Anil; MacFarlane, W. Andrew; Maljuk, Andrey; Granovsky, Sergey; Hoser, Andreas; Pomjakushin, Vladimir; Ollivier, Jacques; Doerr, Mathias; Keimer, Bernhard; Inosov, Dmytro S.; Peets, Darren C.
Source
Phys. Rev. B 108, 174420 (2023)
Subject
Language
Abstract
The cubic perovskite SrFeO$_3$ was recently reported to host hedgehog- and skyrmion-lattice phases in a highly symmetric crystal structure which does not support the Dzyaloshinskii-Moriya interactions commonly invoked to explain such magnetic order. Hints of a complex magnetic phase diagram have also recently been found in powder samples of the single-layer Ruddlesden-Popper analog Sr$_2$FeO$_4$, so a reinvestigation of the bilayer material Sr$_3$Fe$_2$O$_7$, believed to be a simple helimagnet, is called for. Our magnetization and dilatometry studies reveal a rich magnetic phase diagram with at least 6 distinct magnetically ordered phases and strong similarities to that of SrFeO$_3$. In particular, at least one phase is apparently multiple-$\mathbf{q}$, and the $\mathbf{q}$s are not observed to vary among the phases. Since Sr$_3$Fe$_2$O$_7$ has only two possible orientations for its propagation vector, some of the phases are likely exotic multiple-$\mathbf{q}$ order, and it is possible to fully detwin all phases and more readily access their exotic physics.
Comment: 14 pages, 13 figures
Comment: 14 pages, 13 figures