TY  - JOUR
AU  - Potapkin, V.
AU  - Dubrovinsky, L.
AU  - Sergueev, I.
AU  - Ekholm, M.
AU  - Kantor, I.
AU  - Bessas, D.
AU  - Bykova, E.
AU  - Prakapenka, V.
AU  - Rüffer, R.
AU  - Cerantola, V.
AU  - Jönsson, H. J. M.
AU  - Olovsson, W.
AU  - Mankovsky, S.
AU  - Ebert, H.
AU  - Abrikosov, I. A.
AU  - Hermann, Raphael
TI  - Magnetic interactions in NiO at ultrahigh pressure
JO  - Physical review / B
VL  - 93
IS  - 20
SN  - 2469-9950
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2016-02959
SP  - 201110
PY  - 2016
AB  - Magnetic properties of NiO have been studied in the multimegabar pressure range by nuclear forward scattering of synchrotron radiation using the 67.4 keV Mössbauer transition of Ni61. The observed magnetic hyperfine splitting confirms the antiferromagnetic state of NiO up to 280 GPa, the highest pressure where magnetism has been observed so far, in any material. Remarkably, the hyperfine field increases from 8.47 T at ambient pressure to ∼24 T at the highest pressure, ruling out the possibility of a magnetic collapse. A joint x-ray diffraction and extended x-ray-absorption fine structure investigation reveals that NiO remains in a distorted sodium chloride structure in the entire studied pressure range. Ab initio calculations support the experimental observations, and further indicate a complete absence of Mott transition in NiO up to at least 280 GPa.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000376638400001
DO  - DOI:10.1103/PhysRevB.93.201110
UR  - https://juser.fz-juelich.de/record/810082
ER  -