%0 Journal Article
%A Portnichenko, P. Y.
%A Demishev, S. V.
%A Semeno, A. V.
%A Ohta, H.
%A Cameron, A. S.
%A Surmach, M. A.
%A Jang, H.
%A Friemel, G.
%A Dukhnenko, A. V.
%A Shitsevalova, N. Yu.
%A Filipov, V. B.
%A Schneidewind, A.
%A Ollivier, J.
%A Podlesnyak, A.
%A Inosov, D. S.
%T Magnetic field dependence of the neutron spin resonance in CeB $_{6}$
%J Physical review / B
%V 94
%N 3
%@ 2469-9950
%C College Park, Md.
%I APS
%M FZJ-2016-03738
%P 035114
%D 2016
%X In zero magnetic field, the famous neutron spin resonance in the f-electron superconductor CeCoIn5 is similar to the recently discovered exciton peak in the nonsuperconducting CeB6. A magnetic field splits the resonance in CeCoIn5 into two components, indicating that it is a doublet. Here we employ inelastic neutron scattering (INS) to scrutinize the field dependence of spin fluctuations in CeB6. The exciton shows a markedly different behavior without any field splitting. Instead, we observe a second field-induced magnon whose energy increases with field. At the ferromagnetic zone center, however, we find only a single mode with a nonmonotonic field dependence. At low fields, it is initially suppressed to zero together with the antiferromagnetic order parameter, but then reappears at higher fields inside the hidden-order phase, following the energy of an electron spin resonance (ESR). This is a unique example of a ferromagnetic resonance in a heavy-fermion metal seen by both ESR and INS consistently over a broad range of magnetic fields.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000379717700004
%R 10.1103/PhysRevB.94.035114
%U https://juser.fz-juelich.de/record/811237