Magnetic interactions in NiO at ultrahigh pressure

Potapkin, Vasily; Dubrovinsky, Leonid; Sergueev, I.; Ekholm, M.; Kantor, Innokenty; Bessas, D.; Bykova, E.; Prakapenka, V.; Hermann, Raphael P.; Rueffer, Rudolf; Cerantola, V.; Jonsson, H. J. M.; Olovsson, W.; Mankovsky, S.; Ebert, H.; Abrikosov, I. A.

doi:10.1103/PhysRevB.93.201110

Title: Magnetic interactions in NiO at ultrahigh pressure

Journal Article · Tue May 24 00:00:00 EDT 2016 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.93.201110· OSTI ID:1261557

Potapkin, Vasily ^[1]; Dubrovinsky, Leonid ^[2]; Sergueev, I. ^[3]; Ekholm, M. ^[4]; Kantor, Innokenty ^[5]; Bessas, D. ^[5]; Bykova, E. ^[2]; Prakapenka, V. ^[6]; Hermann, Raphael P. ^[7]; Rueffer, Rudolf ^[5]; Cerantola, V. ^[2]; Jonsson, H. J. M. ^[4]; Olovsson, W. ^[4]; Mankovsky, S. ^[8]; Ebert, H. ^[8]; Abrikosov, I. A. ^[9]

Julich Centre for Neutron Science (JCNS) and Peter Grunberg Institut (PGI), JARA-FIT, Forschungszentrum Julich GmbH, Julich (Germany)
Univ. Bayreuth, Bayreuth (Germany)
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
Linkoping Univ., Linkoping (Sweden)
European Synchrotron Radiation Facility, Grenoble (France)
Univ. of Chicago, Chicago, IL (United States)
Julich Centre for Neutron Science (JCNS) and Peter Grunberg Institut (PGI), JARA-FIT, Forschungszentrum Julich GmbH, Julich (Germany); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Ludwig-Maximilian Univ. Munich, Munich (Germany)
Linkoping Univ., Linkoping (Sweden); National Univ. of Science and Technology 'MISIS', Moscow (Russia); Tomsk State Univ., Tomsk (Russia)

Here, magnetic properties of NiO have been studied in the multimegabar pressure range by nuclear forward scattering of synchrotron radiation using the 67.4 keV M ssbauer transition of ⁶¹Ni. 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.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725; AC02-06CH11357

OSTI ID:: 1261557

Alternate ID(s):: OSTI ID: 1254356

Journal Information:: Physical Review B, Vol. 93, Issue 20; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 10 works

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