LAUSR

Abstract Dual field driven caloric effect has aroused great interest in recent years. Hydrostatic pressure can shift the temperature zone of magnetocaloric effect(MCE), but seldom enhance its magnitude. Here, a large enhancement of MCE driven by pressure under magnetic field available by permanent magnet has been achieved in HoCuSi compound without introducing hysteresis loss, which is favorable for developing hybrid field driven refrigeration applications at low temperature regions. A distinct mechanism is revealed. Pressure largely regulates non-collinear spin structure and magnetizing process through affecting crystal field interactions and spin-spin coupling, hence resulting in the significant impact on magnetic properties and MCE.