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$_{7}$

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 0.02a^{} $a n d$ \sim 0.2a^{}$ 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.

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 $_{7}$

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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 $_{7}$

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Influence of Quasi-Bi-Stripe Charge Order on the Resistivity and Magnetism in a Bilayer Manganite La2−2x2−2x​Sr1+2x1+2x​Mn22​O77​

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Influence of Quasi-Bi-Stripe Charge Order on the Resistivity and Magnetism in a Bilayer Manganite La2−2x2−2x​Sr1+2x1+2x​Mn22​O77​

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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 $_{7}$

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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 $_{7}$

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