Magnetic-field effects on the fragile antiferromagnetism in YbBiPt.

Autor: Ueland BG; Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA.; Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA., Kreyssig A; Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA.; Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA., Mun ED; Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA.; Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA.; Department of Physics, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6., Lynn JW; NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA., Harriger LW; NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA., Pratt DK; NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA., Prokeš K; Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany., Hüsges Z; Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany., Toft-Petersen R; Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany., Sauerbrei S; Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA.; Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA., Saunders SM; Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA.; Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA., Furukawa Y; Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA.; Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA., Bud'ko SL; Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA.; Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA., McQueeney RJ; Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA.; Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA., Canfield PC; Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA.; Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA., Goldman AI; Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA.; Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA.
Jazyk: angličtina
Zdroj: Physical review. B [Phys Rev B] 2019 May; Vol. 99 (18).
DOI: 10.1103/physrevb.99.184431
Abstrakt: We present neutron-diffraction data for the cubic-heavy-fermion YbBiPt that show broad magnetic diffraction peaks due to the fragile short-range antiferromagnetic (AFM) order persist under an applied magnetic-field H . Our results for H ⊥ [ 1 ¯ 1 0 ] and a temperature of T = 0.14 1 K show that 1 2 , 1 2 , 3 2 ) magnetic diffraction peak can be described by the same two-peak line shape found for μ 0 H = 0 T below the Néel temperature of T N = 0.4 K . Both components of the peak exist for μ 0 H ≲ 1.4 T , which is well past the AFM phase boundary determined from our new resistivity data. Using neutron-diffraction data taken at T = 0.13 ( 2 ) K for H ∥ 0 0 1 taken at or 1 1 0 , we show that domains of short-range AFM order change size throughout the previously determined AFM and non-Fermi liquid regions of the phase diagram, and that the appearance of a magnetic diffraction peak at 1 2 , 1 2 , 1 2 at μ 0 H ≈ 0.4 T signals canting of the ordered magnetic moment away from 1 1 1 . The continued broadness of the magnetic diffraction peaks under a magnetic field and their persistence across the AFM phase boundary established by detailed transport and thermodynamic experiments present an interesting quandary concerning the nature of YbBiPt's electronic ground state.
Databáze: MEDLINE