@article{a8601fb8eaea40278e193e7174b68881,
title = "Multi- k spin ordering in CaFe3Ti4O12 stabilized by spin-orbit coupling and further-neighbor exchange",
abstract = "Orthogonal spin ordering is rarely observed in magnetic oxides because nearest-neighbor symmetric Heisenberg superexchange interactions usually dominate. We have discovered that in the quadruple perovskite CaFe3Ti4O12, where only the S=2 Fe2+ ion is magnetic, long-range magnetic order consisting of an unusual arrangement of three interpenetrating orthogonal sublattices is stabilized. Each magnetic sublattice corresponds to a set of FeO4 square planes sharing a common orientation. This multi-k magnetic spin ordering is the result of fourth-neighbor spin couplings with a strong easy-axis anisotropy. In an applied magnetic field, each sublattice tends towards ferromagnetic alignment, but remains polarized by internal magnetic fields generated by the others, thus stabilizing in a noncollinear canted ferromagnetic structure. CaFe3Ti4O12 provides a rare example of how nontrivial long-range spin order can arise when near-neighbor Heisenberg superexchange is quenched.",
author = "{Amano Patino}, Midori and {Denis Romero}, Fabio and Masato Goto and Takashi Saito and Fabio Orlandi and Pascal Manuel and Attila Szab{\'o} and Paula Kayser and Hong, {Ka H.} and Alharbi, {Khalid N.} and Attfield, {J. Paul} and Yuichi Shimakawa",
note = "Funding Information: The authors acknowledge the science and technology facility council STFC (U.K.) for the provision of neutron beam time at WISH and POLARIS instruments, ISIS, U.K. We thank R. Smith and Helen Playford for assistance and discussion during collection of neutron-diffraction data at POLARIS. A.S. acknowledges the Oxford-ShanghaiTech collaboration project. This work was partly supported by Grants-in-Aid for Scientific Research (Grants No. 16H02266, No. 17F17039, No. 19H05823, No. 19K15585, No. 19K23650, and No. 20H00397) and by grants for the Integrated Research Consortium on Chemical Sciences and the International Collaborative Research Program of Institute for Chemical Research in Kyoto University from MEXT of Japan. This work was also supported by JSPS Core-to-Core Program (A) Advanced Research Networks and by the Yazaki Memorial Foundation for Science and Technology. Support was also provided by EPSRC and the Royal Society, UK. Publisher Copyright: {\textcopyright} 2021 authors. Published by the American Physical Society.",
year = "2021",
month = dec,
day = "22",
doi = "10.1103/PhysRevResearch.3.043208",
language = "English",
volume = "3",
journal = "Physical Review Research",
issn = "2643-1564",
publisher = "American Physical Society",
number = "4",
}