Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Determination of the magnetic structure of Yb3Pt4:k=0 local-moment antiferromagnet Y. Janssen,1,* M. S. Kim,1 K. S. Park,1,2 L. S. Wu,2 C. Marques,2 M. C. Bennett,2 Y. Chen,3,4 J. Li,3,4 Q. Huang,3
 

Summary: Determination of the magnetic structure of Yb3Pt4:k=0 local-moment antiferromagnet
Y. Janssen,1,* M. S. Kim,1 K. S. Park,1,2 L. S. Wu,2 C. Marques,2 M. C. Bennett,2 Y. Chen,3,4 J. Li,3,4 Q. Huang,3
J. W. Lynn,3 and M. C. Aronson1,2
1Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
2Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794, USA
3NIST Center for Neutron Research, NIST, Gaithersburg, Maryland 20899, USA
4
Department of Materials Science, University of Maryland, College Park, Maryland 20742, USA
Received 26 June 2009; revised manuscript received 8 December 2009; published 1 February 2010
We have used neutron-diffraction measurements to study the zero-field magnetic structure of the interme-
tallic compound Yb3Pt4, which was earlier found to order antiferromagnetically at the Néel temperature TN
=2.4 K, and displays a field-driven quantum-critical point at 1.6 T. In Yb3Pt4, the Yb moments sit on a single
low-symmetry site in the rhombohedral lattice with space group R3¯. The Yb ions form octahedra with edges
that are twisted with respect to the hexagonal unit cell, a twisting that results in every Yb ion having exactly
one Yb nearest neighbor. Below TN, we found new diffracted intensity due to a k=0 magnetic structure. This
magnetic structure was compared to all symmetry-allowed magnetic structures and was subsequently refined.
The best-fitting magnetic-structure model is antiferromagnetic and involves pairs of Yb nearest neighbors on
which the moments point almost exactly toward each other. This structure has moment components within the
ab plane as well as parallel to the c axis although the easy magnetization direction lies in the ab plane. Our
magnetization results suggest that besides the crystal-electric-field anisotropy, anisotropic exchange favoring

  

Source: Aronson, Meigan - Department of Physics and Astronomy, SUNY at Stony Brook

 

Collections: Materials Science; Physics