Regensburg 2022 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 35: Poster 2

MA 35.66: Poster

Donnerstag, 8. September 2022, 16:00–18:00, P4

Monte-Carlo study of commensurate-incommensurate phase transtion of YBaCuFeO5 — •Mukesh Sharma and Tulika Maitra — Indian Institute of Technology Roorkee, Roorkee Uttrakhand, India

Type-II multiferroic materials where ferroelectricity is driven by magnetic order are highly sought after these days. Intense research is being carried out to increase the transition temperature of multiferroicity to near room temperature. YBaCuFeO5(YBCFO) is one such rare material where it has been reported that incommensurate spiral magnetic ordering is stable upto temperatures higher than room temperature even though the presence of ferroelectricity is still debated. Motivated by the recent experimental evidence of tuning commensurate-incommensurate magnetic phase transition temperature in this system via Fe-Cu disorder, we have studied the role of anisotropic exchange and Fe-Cu site disorder on this transition. Using various exchange interactions obtained from density functional theory, our Monte-Carlo simulations show that both anisotropic exchange and site disorder play significant roles in giving rise to spiral magnetic ordering at lower temperatures.