Abstract
YbRh3Si7 is a heavy fermion compound that stands out among Yb-based heavy fermions, with its relatively high magnetic ordering temperature and large Yb-Yb distance. To investigate the origin of the magnetic properties in this compound, we synthesized Co doped YbRh3Si7, achieving a record-high ferromagnetic ordering temperature TC=15.6K, only limited by the Co solubility of 20%. Furthermore, we find a crossover from antiferromagnetic to ferromagnetic order with Co doping. The specific heat and magnetotransport measurements show heavy fermion behavior and the persistence of Kondo latticelike behavior in the Yb(Rh1-xCox)3Si7 series.
| Original language | English |
|---|---|
| Article number | 184404 |
| Journal | Physical Review B |
| Volume | 108 |
| Issue number | 18 |
| DOIs | |
| State | Published - Nov 1 2023 |
Funding
L.Q., S.L., and E.M. acknowledge support for crystal synthesis and magnetotransport measurements from the Robert A. Welch Foundation Grant No. C-2114; and J.M., J.M., and Y.G. were partially supported by the National Science Foundation Grant NSF DMR 1903741. The use of the EPMA facility at the Department of Earth, Environmental and Planetary Sciences, Rice University, Houston, TX, is kindly acknowledged. The neutron scattering work is supported by the US Department of Energy, Basic Energy Sciences, under Grant No. DE-SC0012311 and in part by the Robert A. Welch Foundation Grant No. C-1839 (P.D.). A portion of this research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory.