Non-Magnetic doping effects on magnetic properties of High-Temperature multiferroic compounds YBaCu1-xZnxFeO5 and YBaCuFe1-yGayFeO5
Year: 2025
Type: article
Abstract: This study examines the effects of non-magnetic impurities at different magnetic sites on the magnetic properties of the ordered oxygen-deficient perovskite YBaCuFeO5, which exhibits multiferroic behavior above room temperature. Magnetic susceptibility measurements were performed on polycrystalline samples of YBaCuFe1-yGayO5 with Ga3+ (spin S = 0) doping at Fe3+ (S = 5/2) sites and YBaCu1-xZnxFeO5 with Zn2+ (S = 0) doping at Cu2+ (S = 1/2) sites. Magnetic susceptibility (χ)–temperature (T) curves for both doped systems below 50 K did not demonstrate Curie-like behavior indicative of a paramagnetic component, suggesting that free-end spins were not induced by long-range interactions in the systems. From the peak temperatures of the χ–T curves, the doping concentration dependence of the magnetic transition temperatures TN1 and TN2 was determined. For YBaCuFe1-yGayO5, both TN1 and TN2 decrease linearly with increasing y. In contrast, for YBaCu1-xZnxFeO5, TN1 decreases while TN2 increases with increasing x, with TN2 reaching a maximum value at 349 K at x = 0.09. Although the atomic arrangement of Cu2+ and Fe3+ ions is randomly distributed within (Cu, Fe)O5 oxygen pyramids, these results indicate that Cu2+ and Fe3+ ions play distinct roles in determining the magnetic properties. Based on these experimental findings, a discussion is provided on the physics of non-magnetic impurity effects to different magnetic ions for the high-temperature multiferroic compound YBaCuFeO5.
Authors: Yukio Yasui, Kota Ikeda, Ryusei Mimura
Institution: Meiji University
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,210
Award: G6917942132
OpenAlex ID: W4409785387