Microstructural Distortion and Magnetic Phase Competition of HoFe1−xCrxO3 Near Half-Doping.
- Resource Type
- Article
- Authors
- Zhang, Aimei; Zhu, Jiajia; Pan, Xixi; Wu, Xiaoshan
- Source
- Journal of Superconductivity & Novel Magnetism. Dec2022, Vol. 35 Issue 12, p3761-3771. 11p.
- Subject
- *MAGNETIC transitions
*TRANSITION temperature
*NUCLEAR spin
*BOND angles
*HIGH temperatures
*MAGNETIC entropy
*PHASE transitions
- Language
- ISSN
- 1557-1939
HoFe1−xCrxO3 (x = 0.4–0.6) near half-doping were prepared by conventional solid-state reaction method. A great correlation between the structural distortion and the competition of magnetic order is reported in this work. Fe2+/Fe3+ and Cr3+/Cr4+ ions were checked to coexist in these compounds. With the increase of Cr concentration, the reduction of Fe (Cr)–O–Fe (Cr) bond angle and the rising of octahedral distortion were investigated by X-ray diffraction and Raman spectroscopy. The spin reorientation and the magnetic compensation temperatures of TSR and Tcomp move to high temperatures. The competition of antiferromagnetic (AFM) and ferromagnetic (FM) orders results in a complex magnetic phase transition. There is a Griffiths-like phase at the temperature range between AFM transition temperature TN and Griffiths temperature TG. Weak FM and AFM orders coexist at a temperature below TN, and spin order transforms from Γ4 to Γ2 at TSR. The evolution of the magnetic phase diagram is given for HoFe1−xCrxO3 near half-doping. The results show that the magnetic ground state could be adjusted by controlling the mixed valence states and structural distortion. [ABSTRACT FROM AUTHOR]