“…Among these luminescent materials, Eu 3+ -activated Y 3 Al 5 O 12 (YAG) is an important phosphor with a variety of applications in many luminescent and optical devices due to its excellent performance. [10][11][12][13] As a type of magnetic material, cobalt ferrite (CoFe 2 O 4 ) has received considerable attention because of its moderate saturation magnetization, high coercivity and excellent physical and chemical stability, as well as because of its potential applications in electronic devices, drug delivery technology, magnetic resonance imaging, and information storage. [14][15][16] Presently, researchers are mainly focused on the preparation, properties and applications of magnetic-luminescent bifunctional nanoparticles.…”