Modified copper zinc ferrite nanoparticles doped with Zr ions for hyperthermia applications

Abstract The problem of the present work is to synthesize a nanomagnetic material with low T C below 45 °C and its particle size 30 nm be appropriate for convert magnetic loss into heat energy. A series Cu 0.4 Zn 0.6+ y Zr Fe 2–2 O 4 nanoparticles compositions where = (0.05, 0.1) were synthesized via citrate sol–gel method. prepared samples characterized by X-ray diffraction (XRD) transmission electron microscopy (TEM). grains observed from SEM confirming crystalline structure ferrite which was detected diffraction. Magnetic hysteresis loop measurements illustrate that materials exhibit soft properties at content, while higher content all behave as superparamagnetically without any saturation magnetization M s . initial permeability ( $${\mu }_{i}$$ μ i ) frequency 10 kHz function temperature measured. sudden change in appears around Curie temperature, making our good candidates transducer (MTT) devices. DC resistivity sample 0.05, 0.1 studied. decreases linearly increasing within given range up 666 K samples. dielectric constant nearly independent on through 450 600 common character ferrites. found increase may related AC conductivity. Hyperthermia show maximum specific power 26 w/gr 43 °C, respectively, containing after 2 min measurements. One real applications it used an effective method tumor treatment exposing patient external field.