We observe a twisted magnetocaloric effect (MCE) in a ferrimagnetic ${\mathrm{SmCaCoMnO}}_6$-antiferromagnetic ${\mathrm{Sm}}_{0.1}{\mathrm{Ca}}_{0.9}{\mathrm{MnO}}_3$ composite due to large exchange bias (EB) coupling (maximum EB $\sim 9.45$ kOe at 2 K with a bias field of $\sim 10$ kOe). The isothermal magnetization curves cross each other at high fields, and the crossover field increases with decreasing temperature. This leads to distinct moving peaks at the low temperature $(\le 15 \mathrm{K})$ in the nonmonotonic entropy change vs temperature curves, referred to as twisted MCE. The EB is also observed at low temperatures $(\le 15 \mathrm{K})$, due to the spin glass formation at the interface of ${\mathrm{SmCaCoMnO}}_6$ and ${\mathrm{Sm}}_{0.1}{\mathrm{Ca}}_{0.9}{\mathrm{MnO}}_3$. Similar materials systems without EB do not show the twisted MCE. Our proposed analytical model correlates the twisted MCE with the interacting anisotropies of spin glass and EB coupling at the interface. The coupled MCE and EB opens up new possibilities of simultaneous spintronic device applications and magnetocaloric refrigeration, leading to self-cooled electronics.

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• Exchange bias
• Magnetic anisotropy
• Magnetism
• Magnetocaloric effect
• Spintronics