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TT: Fachverband Tiefe Temperaturen

TT 19: Poster Session: Correlated Electrons 1

TT 19.10: Poster

Montag, 20. März 2017, 15:00–19:00, P2-EG

Magnetic anisotropy in YbNi₄P₂ — •Sven Friedemann¹, Sara Karbassi¹, Saman Ghannadzadeh², Manuel Brando³, Kristin Kliemt⁴, and Cornelius Krellner⁴ — ¹HH Wills Laboratory, University of Bristol, UK — ²High Field Magnet Laboratory, University of Radboud, Nijmegen, NL — ³Max Planck Institute for Chemical Physics of Solids, Dresden, Germany — ⁴Physikalisches Institut, Johann Wolfgang Goethe-Universität, Frankfurt am Main, Germany

YbNi₄P₂ is a rare example of a heavy-fermion compound with ferromagnetic (FM) order. It allows to study the emergence of a FM quantum critical point (QCP) which marks a long-standing challenge in metallic compounds as FM QCPs are avoided in most systems through a change of the transition to 1st order or through an intervening antiferromagnetic phase. YbNi₄P₂ by contrast was demonstrated to have a readily accessible QCP when suppressing the FM order with substitution of phosphorous by arsenic [1]. An alternative route to access the FM QCP could be via a transverse field tuning for strongly anisotropic FM order. We use angular dependent magnetoresistance measurements to extract the anisotropy of the Landé g factor. This will be the basis to understand under which conditions a FM QCP may be accessed via transverse field tuning.
Steppke, A., et al., Science, 339, 933 (2013).