Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 7: Poster Magnetism I
MA 7.26: Poster
Montag, 9. März 2026, 09:30–12:30, P2
Coexistence of ferromagnetism and spin-glass behaviour in CeNiSb3 — •Haribrahma Singh1, Prabuddha Kant Mishra1, Gaurav Kumar2, Aarti Gautam1, Rie Y. Umetsu3, Ratnamala Chatterjee2, and Ashok Kumar Ganguli1,4 — 1Department of Chemistry, Indian Institute of Technology Delhi, 110016, India — 2Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India — 3Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan — 4Department of Chemical Sciences, Indian Institute of Science Education and Research, Berhampur, Odisha 760003, India
We present a comprehensive investigation of the structural and magnetic properties of of CeNiSb3. DC magnetization measurements confirm long-range ferromagnetic ordering below the Curie temperature TC = 7.2 K accompanied by marked magnetic irreversibility. In the ordered phase, CeNiSb3 exhibits strong magnetic anisotropy. Additionally, a field-induced spin-reorientation transition is observed along the b-axis at TC = 6.8 K. Non-equilibrium spin-dynamics measurements reveal a clear memory effect, and thermoremanent magnetization relaxations follow a stretched-exponential form with β=0.30, indicative of spin-glass like behaviour. This is corroborated by AC susceptibility, Power-law analysis yields a characteristic relaxation time of 10^-10s. Under an applied DC magnetic field, the AC susceptibility evolves from a single cusp to a double-peak structure, providing strong evidence for the coexistence of reentrant spin-glass and ferromagnetic ordering below TC in CeNiSb3.
Keywords: Reentrant spin glass; Ferromagnetism