Supercritical CO ₂ ‐Induced Chemical Pressure on BaZrO ₃ for Room‐Temperature Ferromagnetism

Abstract The modulation of intrinsic magnetic properties of materials is of great importance for the exploration of new materials in the fields of information storage and spintronics. Herein, room‐temperature ferromagnetic properties in BaZrO ₃ are successfully induced using supercritical CO ₂ . The highest saturation magnetization intensity of BaZrO ₃ is observed at 16 MPa, with a value of 0.08189 emu g ⁻¹ . It is noteworthy that this technique is observed to modulate the ferromagnetic properties of the material by converting the external physical pressure into the chemical pressure within the material through the intercalation and de‐intercalation of CO ₂ molecules. This result gives us a new understanding of the modification mechanism of SC‐CO ₂ , which is important for material modification.