Description: Magnetic interactions in NiO at ultrahigh pressure

This title appears in the Scientific Report : 2016

Magnetic interactions in NiO at ultrahigh pressure

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 pre...

Personal Name(s):	Potapkin, V. (Corresponding author)
	Dubrovinsky, L. / Sergueev, I. / Ekholm, M. / Kantor, I. / Bessas, D. / Bykova, E. / Prakapenka, V. / Rüffer, R. / Cerantola, V. / Jönsson, H. J. M. / Olovsson, W. / Mankovsky, S. / Ebert, H. / Abrikosov, I. A. / Hermann, Raphael
Contributing Institute:	Streumethoden; JCNS-2 JARA-FIT; JARA-FIT Streumethoden; PGI-4
Published in:	Physical review / B, 93 (2016) 20, S. 201110
Imprint:	College Park, Md. APS 2016
DOI:	10.1103/PhysRevB.93.201110
Document Type:	Journal Article
Research Program:	Jülich Centre for Neutron Research (JCNS) Materials and Processes for Energy and Transport Technologies Quantum Condensed Matter: Magnetism, Superconductivity Controlling Collective States Controlling Collective States
Link:	OpenAccess OpenAccess
	Publikationsportal JuSER

Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.93.201110 in citations.
Please use the identifier: http://hdl.handle.net/2128/11397 in citations.

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.