Hyperfine Fields and Lattice Deformations in Ba and Sr Hexaferrites

• Authors: V. Chlan , K. Kouřil , H. Štěpánková
• Languages of publication: EN

Abstracts

EN

Hyperfine magnetic fields on ⁵⁷Fe nuclei in Sr and Ba hexagonal ferrites are calculated in dependence on unit cell volume and c/a ratio. By analysing the local deformations of Fe-O-Fe triads the results are explained as changes to contact hyperfine field due to Fe-O covalency effects and supertransferred hyperfine fields. Most pronounced effect is found for bipyramidal iron Fe(b) where the total contact field is reduced due to noticeable shortening of Fe(b)-O bonds.

Keywords

EN

31.15.aj; 75.30.Et; 76.60.Jx

Discipline

• 75.30.Et: Exchange and superexchange interactions(see also 71.70.Gm Exchange interactions)
• 31.15.aj: Relativistic corrections, spin-orbit effects, fine structure; hyperfine structure
• 76.60.Jx: Effects of internal magnetic fields

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 2
• Pages: 594-596

Dates

published

2015-02

Contributors

author

V. Chlan

• Faculty of Mathematics and Physics, Charles University in Prague, V Holešovičkách 2, Prague, Czech Republic

author

K. Kouřil

• Faculty of Mathematics and Physics, Charles University in Prague, V Holešovičkách 2, Prague, Czech Republic

author

H. Štěpánková

• Faculty of Mathematics and Physics, Charles University in Prague, V Holešovičkách 2, Prague, Czech Republic

References

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Identifiers

DOI

10.12693/APhysPolA.127.594