Berlin 2024 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
TT: Fachverband Tiefe Temperaturen
TT 80: Correlated Electrons: Poster
TT 80.24: Poster
Thursday, March 21, 2024, 15:00–18:00, Poster E
Evidence for low temperature magnetic ordering in triangular YbBO3 — •Marvin Klinger1, Prachi Telang1, Tim Treu1, Anna Moser1, Ramesh Nath2, Surya Mohanty2, Gediminas Simutis3, Anton Jesche1, and Philipp Gegenwart1 — 1EP VI, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg — 2School of Physics, Indian Institute of Science Education and Research Thiruvananthapuram — 3Laboratory for Neutron and Muon Instrumentation, Paul Scherrer Institut
The triangular magnet YbBO3 attracted considerable attention as a quantum spin liquid candidate material with absent magnetic long-range order as well as spin freezing down to 20 mK in muon spin rotation (µSR) experiments [1]. In the course of investigating the suitability of this material for millikelvin adiabatic demagnetization refrigeration, we prepared a phase pure YbBO3 powder, mixed it with fine silver powder for optimizing thermal contact and pressed pellets for standardized ADR performance test in the PPMS, similar as in [2]. The heat capacity, determined from the warming curve, indicates a clear and sharp magnetic phase transition at 400 mK, also confirmed by µSR on the same pellet. This indicates that silver is required to bind the grains together for thermal contact, otherwise the sample temperature could be significantly increased leading to wrong conclusions.
Work supported by the German Research Foundation through project 514162746 (GE 1640/11-1).
[1] K. Somesh et al., Phys. Rev. B 107, 064421 (2023).
[2] A. Jesche et al., Phys. Rev. B 107, 104402 (2023).
Keywords: Magnetic order; Adiabatic demagnetization refrigeration; sub-Kelvin