Influence of Quasi-Bi-Stripe Charge Order on the Resistivity and Magnetism in a Bilayer Manganite La$_{2-2x}$Sr$_{1+2x}$Mn$_{2}$O$_{7}$

M. Kubota; Y. Oohara; H. Yoshizawa; H. Fujioka; K. Shimizu; K. Hirota; Y. Moritomo; Y. Endoh

doi:10.1143/JPSJ.69.1986

paper

Influence of Quasi-Bi-Stripe Charge Order on the Resistivity and Magnetism in a Bilayer Manganite La $_{2 - 2 x}$ Sr $_{1 + 2 x}$ Mn $_{2}$ O $_{7}$

arXiv:cond-mat/0005193 · doi:10.1143/JPSJ.69.1986

Abstract

The charge ordering in the bilayer manganite system La $_{2 - 2 x}$ Sr $_{1 + 2 x}$ Mn $_{2}$ O $_{7}$ with $0.30 \leq x \leq 0.50$ has been studied by neutron diffraction. The charge order is characterized by the propagation vector parallel to the [1 0 0] direction (MnO $_{2}$ direction), but the correlation length is short-ranged and extremely anisotropic, being $\sim 0.02 a^{*}$ and $\sim 0.2 a^{*}$ parallel and perpendicular to the modulation direction, respectively. The observed charge order can be viewed as a quasi-bi-stripe order, and accounts well for the $x$ dependence of the resistivity. The quasi-bistripe order is stable within the ferromagnetic (FM) MnO $_{2}$ layers in the A-type antiferromagnetic order, but is instabilized by the 3 dimensional FM order.

11 pages, 5 figures

References in corpus (1)

Charge melting and polaron collapse in $L a_{1.2} S r_{1.8} M n_{2} O_{7}$

Influence of Quasi-Bi-Stripe Charge Order on the Resistivity and Magnetism in a Bilayer Manganite La2−2x​Sr1+2x​Mn2​O7​

Abstract

References in corpus (1)

Cited by in corpus (10)

Influence of Quasi-Bi-Stripe Charge Order on the Resistivity and Magnetism in a Bilayer Manganite La $_{2 - 2 x}$ Sr $_{1 + 2 x}$ Mn $_{2}$ O $_{7}$