Magnetism in quasi-two-dimensional tri-layer La$_{2.1}$Sr$_{1.9}$Mn$_3$O$_{10}$ manganite

Jeetendra Kumar Tiwari; Birendra Kumar; Harish Chandr Chauhan; Subhasis Ghosh

paper

Magnetism in quasi-two-dimensional tri-layer La $_{2.1}$ Sr $_{1.9}$ Mn $_{3}$ O $_{10}$ manganite

arXiv:2011.13433

Abstract

The tri-layer La $_{3 - 3 x}$ Sr $_{1 + 3 x}$ Mn $_{3}$ O $_{10}$ manganites of Ruddlesden-Popper (RP) series are naturally arranged layered structure with alternate stacking of m-MnO $_{2}$ (m = 3) planes and rock-salt type block layers (La, Sr) $_{2}$ O $_{2}$ along c-axis. The dimensionality of the RP series manganites depends on the number of perovskite layers and significantly affects the magnetic and transport properties of the system. The tri-layer La $_{2.1}$ Sr $_{1.9}$ Mn $_{3}$ O $_{10}$ shows second-order magnetic phase transition. The critical behavior of phase transition has been studied around the transition temperature (T $_{C}$ ) to understand the low dimensional magnetism in tri-layer La $_{2.1}$ Sr $_{1.9}$ Mn $_{3}$ O $_{10}$ of the Ruddlesden-Popper series manganites. We have determined the critical exponents for tri-layer La $_{2.1}$ Sr $_{1.9}$ Mn $_{3}$ O $_{10}$ , which belong to the short-range two-dimensional (2D)-Ising universality class. The low dimensional magnetism in tri-layer La $_{2.1}$ Sr $_{1.9}$ Mn $_{3}$ O $_{10}$ manganite is also explained with the help of renormalization group theoretical approach for short-range 2D-Ising systems. It has been shown that the layered structure of tri-layer La $_{2.1}$ Sr $_{1.9}$ Mn $_{3}$ O $_{10}$ results in three different type of interactions intra-planer ( $J_{ab}$ ), intra-tri-layer ( $J_{c}$ ) and inter-tri-layer ( $J^{'}$ ) such that $J_{ab}$ $>$ $J_{c}$ $>>$ $J^{'}$ and competition among these give rise to the canted antiferromagnetic spin structure above T $_{C}$ . Based on the similar magnetic interaction in bi-layer manganite, we propose that the tri-layer La $_{2.1}$ Sr $_{1.9}$ Mn $_{3}$ O $_{10}$ should be able to host the skyrmion below T $_{C}$ due to its strong anisotropy and layered structure.

12 Pages and 10 Figures

Magnetism in quasi-two-dimensional tri-layer La2.1​Sr1.9​Mn3​O10​ manganite

Abstract

Magnetism in quasi-two-dimensional tri-layer La $_{2.1}$ Sr $_{1.9}$ Mn $_{3}$ O $_{10}$ manganite