Excitations and magnetization density distribution in the dilute ferromagnetic semiconductorYb14MnSb11

M. B. Stone, V. O. Garlea, B. Gillon, A. Cousson, A. D. Christianson, M. D. Lumsden, S. E. Nagler, D. Mandrus, B. C. Sales
2017 Physical review B  
Yb14MnSb11 is a rare example of a Kondo lattice compound with ferromagnetic dominated RKKY interactions. As a ferromagnetic semiconductor with Tc ≈ 53 K, it is also a potential compound for exploration of spintronic devices. Here we describe measurements which answer remaining questions regarding the energy scales of the exchange interactions, the valence and the magnetization density distribution in this system. We find that the system consists of RKKY exchange coupled Mn 2+ sites with nearest
more » ... sites with nearest and next nearest exchange interactions dominating the magnetic spectrum with no significant magnetization density localized on other atomic sites. The extended spread of a negative magnetization around each of the Mn ions supports a Kondo screening cloud scenario for Yb14MnSb11.
doi:10.1103/physrevb.95.020412 fatcat:zltnbbsxu5hexcjv2bth6sxkli