  We propose conceptually novel thermopile structures for the anisotropic
magneto-Peltier effect (AMPE) to enhance its heating/cooling power. The
cross-shaped thermopile, one of the representative AMPE-based thermopile
structures, consists of four L-shaped ferromagnetic metals arranged in a
cross-shaped configuration, which allows concentration of the AMPE-induced
temperature modulation at the center of the cross structure. The AMPE-based
thermopile does not require the use of any complicated junctions comprising
different materials, enabling the design of compact and versatile temperature
controllers for nanoscale devices.
