Recent Progress of Multiferroic Perovskite Manganites

Abstract

Many multiferroic materials, with various chemical compositions and crystal structures, have been discovered in the past years. Among these multiferroics, some perovskite manganites with ferroelectricity driven by magnetic orders are of particular interest. In these multiferroic perovskite manganites, not only their multiferroic properties are quite prominent, but also the involved physical mechanisms are very plenty and representative. In this Brief Review, we will introduce some recent theoretical and experimental progress on multiferroic manganites.

Ferrielectricity in DyMn2O5: A golden touchstone for multiferroicity of RMn2O5 family

“…[1][2][3][4] On one hand, these compounds do enable a generation of ferroelectricity by magnetism-relevant mechanisms rather than lattice phonon-mode softening widely known in textbooks of ferroelectricity, [5][6][7] since such phenomena had never been observed in realistic materials before. On the other hand, the strong coupling between electric polarization (P) and magnetization (M) plus their cross-controls via electric and magnetic stimuli routes have inspired continuous interest in the underlying mechanisms.…”

“…Surely, details of such responses can be fascinating and materials dependent, and readers may consult recent review papers. 1,3,4,10 Apart from the two generic aspects, reality is that many more observed phenomena cannot be reasonably understood within the two respect frameworks. One issue to be covered in this mini-review is the very different FE behaviors in compounds with coexisting 4f and 3d moments.…”

Spontaneous magnetization aboveTCin polycrystallineLa0.7Ca0.3MnO3Turcaud1, Pereira2, Sandeman3 et al. 2014Phys. Rev. B394191View full textAdd to dashboardCite

“…Manganites have been extensively studied over many decades, in recent years because of interest in their colossal magnetoresistance (CMR) [1], magnetocaloric [2,3], and multiferroic [4] properties. To explain the nature of these impressive effects, it was advanced early on that the doubleexchange mechanism was the source of magnetic coupling [5,6] in these materials where localized Mn t 2g spins are mediated by itinerant e g electrons hopping via manganeseoxygen-manganese metallic bonds.…”

Canted magnetic ground state of quarter-doped manganitesR0.75Ca0.25MnO3(R = Y, Tb, Dy, Ho, and Er)

“…While the cases of pure undoped manganites have been extensively studied, 15,16 the recent exploration for potential new magnetic phases has focused on doped manganites in the narrow-bandwidth limit. 17,18 The competition between the ferromagnetic double exchange interactions and the antiferromagnetic superexchange interactions, plus the robust Jahn-Teller spin-lattice coupling, makes the doped narrow-bandwidth manganites an ideal playground to search for new magnetic phases.…”