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TT: Fachverband Tiefe Temperaturen
TT 26: Correlated Magnetism – Frustrated Systems
TT 26.6: Vortrag
Mittwoch, 19. März 2025, 10:45–11:00, H33
Exploring Geometrical Frustration in Ho3ScO6-II: Magnetic Properties and Structural Insights — •Abanoub Hanna1, Cintli Aguilar Maldonado1, and Bella Lake1,2 — 1Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner Platz 1, D-14109 Berlin, Germany — 2Institut für Festkörperphysik,Technische Universität Berlin, Berlin, Germany
Geometrical frustration occurs in magnetic compounds when the arrangement of magnetic ions in triangular or tetrahedral lattices leads to competing interactions, resulting in non-classical magnetic states. This study examines the cubic compound Ho3ScO6-II, which crystallizes in a bixbyite-type structure with a centrosymmetric cubic space group Ia3* and exhibits no magnetic ordering above 1.8 K, underscoring its geometrically frustrated nature. Unlike its polymorph Ho3ScO6-I, which shows long-range magnetic order at 4.4 K, Ho3ScO6-II lacks magnetic anisotropy and presents a Curie-Weiss temperature of approximately -20 K and an effective magnetic moment (µeff) of 9.8 µB, indicating significant antiferromagnetic interactions. Additionally, the study compares Ho3ScO6-II with Er3ScO6, which is isostructural and exhibits magnetic ordering around 2.1 K that is suppressed under external magnetic fields. This comparison highlights the contrasting behaviours of these compounds, contributing to a deeper understanding of frustrated magnetism within the RE3ScO6 system (RE = Ho, Er). The findings provide valuable insights into the unique structural and magnetic properties of Ho3ScO6-II and suggest potential applications in spintronic devices and quantum computing.
Keywords: Ho3ScO6; Geometrical frustration; Three dimensional spin web; Antiferromagnetic interactions