ISSN:
1090-6509
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The effect of high pressures P on the Néel temperature T N , the crystal lattice parameters, and the magnitude of the hyperfine magnetic field H Sn at a nucleus of a diamagnetic tin atom was studied in pure and tin-doped orthoferrites RFeO3 (R = Nd, Lu). The dependence of these quantities on the geometry of the exchange bonds, specifically, the angle and length of the chemical bond Fe-O-Fe(Sn), was analyzed. It was established that under pressure the angular contribution decreases and the radial contribution increases T N and H Sn, the radial contribution being greater than the angular contribution in absolute magnitude. Numerical estimates were obtained for the angular and radial contributions to T N and H Sn. In lutecium orthoferrite, at P 〉 30 GPa anomalies indicating a possible phase transition were observed in the behavior of the lattice parameters and the value of H Sn.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1134/1.559108
Permalink