Low-energy excitations near a field-induced multi-quantum critical point in Nb1-yFe2+y
Our previous neutron scattering of ferromagnetic (FM) Nb1-yFe2+y revealed that chemical composition (y) tuning leads to a FM quantum-critical point masked by an emerging spin-density wave (SDW). This scenario could be connected to many exciting phenomena, including field-induced quantum-critical lines, quantum tri-critical points, and quantum multicritical points. The latter could be reached in Nb1-yFe2+y by transverse-field tuning of a nearly stoichiometric sample. Here, we propose to follow this strategy and measure the transverse-field evolution of low-energy excitations across the suspected quantum multi-critical point. The results would form an important test for, e.g., order-by-disorder models that predict the emergence of modulated order at the border of ferromagnetism. We apply for 7 days of beamtime at ThALES.
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The recommended format for citing this dataset in a research publication is in the following format:
NIKLOWITZ Philipp; GROSCHE Malte; PFLEIDERER Christian; Thomas poulis and STEFFENS Paul. (2023). Low-energy excitations near a field-induced multi-quantum critical point in Nb1-yFe2+y. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-03-1764
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