Thermomagnetic Properties Improved by Self-Organized Flower-Like Phase Separation of Ferromagnetic C0_2Dy_(0.5)Mn_(0.5)Sn

摘要

A thermodynamically stable phase separation of Co_2Dy(0.5)Mn(0.5)Sn into the Heusler compound Co_2MnSn and Co_8Dy_3Sn_4 is induced by rapid cooling from the liquid phase. The phase separation forms an ordered flower-like structure on the microscale. The increased scattering of phonons at the phase boundaries reduces the thermal conductivity and thus improves thermoelectric and spincaloric properties.