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Title: Excitations and magnetization density distribution in the dilute ferromagnetic semiconductor Yb 14 MnSb 11

Journal Article · · Physical Review B
 [1];  [1];  [2];  [2];  [1];  [1];  [1];  [3];  [4]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
  2. Alternative Energies and Atomic Energy Commission (CEA) and National Center for Scientific Research (CNRS), Saclay (France). Leon Brilloun Lab.
  3. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division

One rare example of a Kondo lattice compound with ferromagnetic dominated RKKY interactions is Yb$$_{14}$$MnSb$$_{11}$$. As a ferromagnetic semiconductor with $$T_c \approx 53$$~K, it is also a potential compound for exploration of spintronic devices. This material is furthermore one of the most efficient high temperature thermoelectrics. 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 also find that the system consists of RKKY exchange coupled Mn$$^{2+}$$ 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 Yb$$_{14}$$MnSb$$_{11}$$.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1360061
Alternate ID(s):
OSTI ID: 1341271
Journal Information:
Physical Review B, Vol. 95, Issue 2; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

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Cited By (2)

Possible observation of Kondo screening cloud in Yb 14 MnSb 11 journal October 2019
Seebeck and Figure of Merit Enhancement by Rare Earth Doping in Yb14-xRExZnSb11 (x = 0.5) journal March 2019

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