%0 Journal Article
%A Alekseev, P. A.
%A Nemkovskiy, Kirill
%A Mignot, J.-M.
%A Clementyev, E. S.
%A Ivanov, A. S.
%A Rols, S.
%A Bewley, R. I.
%A Filipov, V. B.
%A Shitsevalova, N. Yu.
%T Possible undercompensation effect in the Kondo insulator (Yb,Tm)B${}_{12}$J
%J Physical review / B
%V 89
%N 11
%@ 1098-0121
%C College Park, Md.
%I APS
%M FZJ-2015-01485
%P 115121
%D 2014
%X The effects of Tm substitution on the dynamical magnetic response of Yb1−xTmxB12 (x=0, 0.08, 0.15, and 0.75) and Lu0.92Tm0.08B12 compounds have been studied using time-of-flight inelastic neutron scattering. Major changes were observed in the spectral structure and temperature evolution of the Yb contribution to the inelastic response for a rather low content of magnetic Tm ions. A sizable influence of the RB12 host (YbB12, as compared to LuB12 or pure TmB12) on the crystal-field splitting of the Tm3+ ion is also reported. The results point to a specific effect of impurities carrying a magnetic moment (Tm, as compared to Lu or Zr) in a Kondo insulator, which is thought to reflect the “undercompensation” of Yb magnetic moments, originally Kondo screened in pure YbB12. A parallel is made with the strong effect of Tm substitution on the temperature dependence of the Seebeck coefficient in Yb1−xTmxB12, which was reported previously
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000333125500002
%R 10.1103/PhysRevB.89.115121
%U https://juser.fz-juelich.de/record/187996