铁电体具有很高的介电常数ε,铁磁体具有很高的磁导率μ,两者还各具有许多铁电性或铁磁性效应而提供了丰富的技术应用。若能研制成功铁电-铁磁性晶体,则可提供同时具有高ε和高μ的材料,并且有可能出现新的铁电-铁磁耦合效应。目前,虽然同时具有铁电性和铁磁性的单晶体研制尚未取得实质性成功,但研制高ε和高μ混合陶瓷的可能性的确存在;这 Ferroelectrics have a high dielectric constant ε, and ferromagnets have a high magnetic permeability μ, both of which also have many ferroelectric or ferromagnetic effects and provide a wealth of technical applications. If successful ferroelectric-ferromagnetic crystals can be developed, materials with both high ε and high μ may be provided, and new ferroelectric-ferromagnetic coupling effects may occur. At present, although the development of single crystals with both ferroelectric and ferromagnetic properties has not yet achieved substantial success, the possibility of developing high-ε and high-μ hybrid ceramics does exist;