Observation of a New Magnetic Anomaly Below the Ferromagnetic Curie Temperature in Yb14MnSb11
- University of South Florida, Tampa
- ORNL
Yb{sub 14}MnSb{sub 11} is an unusual ferromagnet with a Curie temperature of 52 {+-} 1 K. Recent optical, Hall, magnetic, and thermodynamic measurements indicate that Yb{sub 14}MnSb{sub 11} may be a rare example of an underscreened Kondo lattice. We report the first experimental observation of a new magnetic anomaly in this system at around 47 K, a few degrees below T{sub c}. Systematic investigations of the ac and dc susceptibilities of Yb{sub 14}MnSb{sub 11} single crystals reveal features associated with possible spin reorientation at this temperature. This new anomaly is extremely sensitive to the applied measurement field and is absent in temperature-dependent dc magnetization data for fields above 50 Oe. The origin of this could be due to decoupling of two distinct magnetic sublattices associated with MnSb{sub 4} tetrahedra.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 1003440
- Journal Information:
- Physical Review Letters, Vol. 95, Issue 22; ISSN 0031--9007
- Country of Publication:
- United States
- Language:
- English
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