In this work, magnetic and transport properties of ${\mathrm{LaSrMnRuO}}_6$ are studied in detail. The absence of a superlattice peak at $\sim {19}^{\circ }$ in the x-ray diffraction pattern indicates the Mn/Ru disorder at B-site, known as B-site disorder. The ZFC curve exhibits a weak ferromagnetic transition around $T_{C1}\sim 223\mathrm{K}$, followed by a cluster glass transition at $T_{C2}\sim 32\mathrm{K}$, as validated by frequency-dependent ac susceptibility studies. The high-temperature Curie-Weiss fit reveals predominant ferromagnetic interactions, while the S-shape of the M–H hysteresis loop at 300 K indicates the presence of short-range ferromagnetic correlations above $T_C$. Resistivity follows the small polaron hopping (SPH) model in the 118–380 K temperature range, yielding a room-temperature conductivity of 3.02 S/cm, which suggests semiconducting-like behavior at room temperature. Temperature-dependent magnetoresistance (MR) displays anomalies at ∼230 K and ∼30 K corresponding to the high-temperature ferromagnetic transition $\left(T_{C1}\right)$ and low-temperature cluster glass transition $\left(T_{C2}\right)$, respectively. Field-dependent MR shows a sharp increase at low fields below the cluster glass temperature, suggesting spin-polarized intercluster tunnelling of charge carriers. The gradual linear increase in MR with the applied magnetic field at high temperature is attributed to the intrinsic suppression of spin-disorder scattering induced by the B-site disorder. The absence of signature corresponding to $T_{C2}\sim 32\mathrm{K}$ in the $C_p$ vs T curve further supports cluster glass behavior.

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• Electrical conductivity
• Magnetic anisotropy
• Magnetic interactions
• Magnetic order
• Magnetic susceptibility
• Magnetism
• Magnetotransport