Regensburg 2025 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 6: Phase Transformations
MM 6.3: Talk
Monday, March 17, 2025, 16:15–16:30, H10
Magnetic-field induced phase transition crossover in the triangular-lattice antiferromagnet: Ba3CoSbO9 — •Sanjay Kumar1, Koushik Chakraborty2, Aditi Agrawal2, Shalini Mishra3, M. P. Saravanan2, Arvind Kumar Yogi2, Satyapal S. Rathore4, and Rashi Nathawat1 — 1Functional Ceramics and Smart Materials Lab, Department of Physics, Manipal University Jaipur, Jaipur - 303007, India — 2UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore-452001, India — 3Department of Physics, Govt. Holkar Science College, Indore (M.P.) 452001, India — 4Department of Physics, Cluster University of Jammu, Jammu * 180001, India
We report magnetic and structural properties of triangular-lattice antiferromagnet Ba3CoSbO9 by means of x-ray diffraction (XRD), magnetic susceptibility, specific heat, x-ray photoelectron spectroscopy (XPS), and dielectric measurements. Thermodynamic measurements show a long-range ordered (LRO) state at Néel temperature TN = 3 K which was found to be shift at higher temperatures at about TN = 4.1 K under the higher magnetic fields. Moreover, we have found higher Curie-Weiss temperature θCW ∼-133.2 K from the inverse susceptibility fit which reveals frustration parameter about 44, suggesting magnetic lattice is highly frustrated. Further, a spin-glass state signature was evident at around 6.5 K, which was found to be fully suppressed at a higher magnetic field ( H ∼16 T). Interestingly, Ba3CoSbO9 exhibits a broad maximum at around Tmax ∼5 K which becomes pronounced as the magnetic field is increased.
Keywords: Quantum Materials; X-ray diffraction; Magnetism; Frustrated lattice