Key points are not available for this paper at this time.
Materials that exhibit strongly coupled magnetic order and electronic properties are crucial for both fundamental research and technological applications. However, finding a material that not only shows remarkable magnetoresistive responses but also has an easily tunable ground state remains a challenge. Here, we report successful manipulation of the magnetic and transport properties of EuCd₂P₂, which is transformed from an A-type antiferromagnet (TN = 11 K) exhibiting colossal magnetoresistance into a ferromagnet (TC = 47 K) with metallic behavior. The dramatic alteration results from a low hole concentration of 10^19 cm^-3 induced by changing the growth conditions. Electronic structure and total energy calculations confirm the tunability of magnetism with a small carrier concentration for EuCd₂P₂. It is feasible to switch between the magnetic states by using field-effect to control the carrier density, thereby changing the magneto-electronic response. The controllable magnetism and electrical transport of EuCd₂P₂ make it a potential candidate for spintronics.
Chen et al. (Sun,) studied this question.