Polaron Ordering in Low-DopingLa1−xSrxMnO3

Structure and spin dynamics ofLa0.85Sr0.15MnO3Vasiliu-Doloc1, Lynn2, Moudden3 et al. 1998Phys. Rev. B785650View full textAdd to dashboardCite

“…The resistivity upturn for the x = 0.10 and 0.15 systems has been associated by Yamada et al 20 with the onset of a polaron ordered phase with the periodicity 2a × 2b × 4c in the cubic perovskite cell. These authors have based their conclusion on the observation of superlattice peaks indexed as (h ± 1/4, k ± 1/4, 0) or (h, k, l±1/2) in a multidomain crystal composed of microtwins.…”

Soft vibrational mode associated with incommensurate orbital order in multiferroicCaMn7O12

“…7 It is thus no surprise that most orbital order in the manganites exhibits some form of "lock-in" with the crystal lattice, [8][9][10][11][12] or with concomitant charge-ordering patterns. [13][14][15][16] In the latter case the Mn ions segregate themselves into 3+ and 4+ valence states, and because orbital order pertains only to the Mn 3+ sub-lattice, the ordering pattern develops on top of the charge order, usually in a commensurate fashion, even though the charge order itself may not be commensurate with the undistorted crystal lattice.…”

Ferromagnetic insulating state in manganites:55MnNMR study

“…FMI state may be realized in several ways, in particular it occurs when the doping is low, in the systems with strong disorder or distortions in the lattice or for certain substitutions on the Mn sites. The microscopic nature of these FMI states is far from being clear -several models, including charge and/or orbital ordering, superexchange ferromagnetic interactions, cluster-glass state, phase segregation between ferromagnetic metallic and insulating charge-ordered clusters, have been examined in this context [2][3][4][5][6].…”