Static and dynamic susceptibility in the putative ferromagnetic quantum critical system YbNi4P2 probed by 31P NMR. Issue 3 (4th March 2013)

• Record Type: Journal Article
• Authors: Sarkar, Rajib; Khuntia, Panchanan; Spehling, Johannes; Krellner, Cornelius; Geibel, Christoph; Klauss, Hans‐Henning; Baenitz, Michael
• Is Part Of: Physica status solidi. Volume 250:Issue 3(2013:Mar.)
• Page Start: 519
• Page End: 521
• Publication Date: 2013-03-04
• Subjects: Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201200776
• Languages: English
• ISSNs: 0370-1972

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The ferromagnetic (FM) quantum critical system YbNi₄P₂ has been investigated by means of ³¹P‐NMR. This is a newly discovered heavy fermion system which shows a FM transition at a very low <italic>T</italic>_C = 170 mK. The present reported result is the extension of our previous work published in Ref. <xref ref-type="link" rid="bib11">11</xref>. ³¹P NMR results suggest the validity of the Korringa law in the presence of strong FM correlations. ³¹P NMR spectra have shown the anisotropic nature. The local magnetization derived from our NMR spectra is presented as a function of field at selected temperatures. The obtained spin‐lattice relaxation rate ³¹(1/<italic>T</italic>₁<italic>T</italic>) follows a weak power‐law as <italic>T</italic>^−0.75 in a wide field range down to <italic>T</italic> = 1.8 K. Possible scenarios for this unusual power‐law behavior are discussed. Additionally, ³¹(1/<italic>T</italic>₁<italic>T</italic>) is nicely scaled with the observed (<italic>C</italic>/<italic>T</italic>)² ∼ <italic>T</italic>^−0.8 power law in the temperature range 1.8–10 K within the framework of renormalized Landau Fermi Liquid theory.</p> </abstract>