Revisiting the A-type antiferromagnet NaNiO2 with muon spin rotation measurements and density functional theory calculations

QC 20201127
An A-type antiferromagnet, NaNiO2, was examined by means of positive muon spin rotation and relaxation (mu+SR) measurements and first-principles calculations based on a density functional theory (DFT). Below T-N = 20 K, a clear muon spin precession signal was observed in the mu+SR time spectrum recorded under zero field, due to the formation of a static internal magnetic field. The microscopic origin of such an internal field was computed as a sum of dipolar and hyperfine contact fields at the site (0.624, 0, 0.854), where both the muon site and the local spin density at such a site were predicted with DFT calculations. While the computed values were consistent with experimentally obtained ones, in both the antiferromagnetic and the paramagnetic states, the contribution of the hyperfine contact field was shown to be insignificant even below T-N. Finally, measurements at higher temperatures signified thermally activated Na-ion diffusion with E-a = 50(20) meV and D-Na(300K) = 8.8 x 10(-11) cm(2)/s, commonly observed in layered-type compounds.

Ohta, HirotoKyoto Univ, Engn Educ Res Ctr, Grad Sch Engn, Kyoto 6158530, Japan.;Kyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6068502, Japan. (författare)
Kamazawa, KazuyaCROSS Neutron Sci & Technol Ctr, Tokai, Ibaraki 3191106, Japan. (författare)
Stubbs, Scott L.Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada. (författare)
Ofer, OrenTRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada. (författare)
Månsson, MartinKTH,Material- och nanofysik(Swepub:kth)u1sajjx0 (författare)
Michioka, ChishiroKyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6068502, Japan. (författare)
Yoshimura, KazuyoshiKyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6068502, Japan. (författare)
Hitti, BassamTRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada. (författare)
Arseneau, DonaldTRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada. (författare)
Morris, Gerald D.TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada. (författare)
Ansaldo, Eduardo J.Univ Saskatchewan, Dept Phys & Engn Phys, Saskatoon, SK S7N 5E2, Canada. (författare)
Brewer, Jess H.Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada.;TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada. (författare)
Sugiyama, JunCROSS Neutron Sci & Technol Ctr, Tokai, Ibaraki 3191106, Japan.;Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan.;High Energy Accelerator Res Org, KEK, Tokai, Ibaraki 3191106, Japan. (författare)
KTHMaterial- och nanofysik (creator_code:org_t)

Av författaren/redakt...: Forslund, Ola Ke ...; Ohta, Hiroto; Kamazawa, Kazuya; Stubbs, Scott L.; Ofer, Oren; Månsson, Martin; visa fler...; Michioka, Chishi ...; Yoshimura, Kazuy ...; Hitti, Bassam; Arseneau, Donald; Morris, Gerald D ...; Ansaldo, Eduardo ...; Brewer, Jess H.; Sugiyama, Jun; visa färre...

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