Magnetic phase in the near-surface region of an FeBO3 single crystal
An FeBO3 single crystal was studied from 291 K up to the Neel temperature T(N) = 348.35 K by depth selective conversion electron Mossbauer spectroscopy in ultrahigh vacuum (10(-9) mbar). A new magnetic near-surface phase was found. Its thickness D diverges on approaching T(N) and gives a critical exponent for the correlation length of nu = 0.59(4). The phase boundary between the bulk and near-surface phase could be identified.
Stahl
B
Fachbereich Materialwissenschaft, Fachgebiet Dunne Schichten, Petersenstrasse 23, TU Darmstadt, D-64287 Darmstadt, Germany.
Kankeleit
E
Gellert
R
Muller
M
Kamzin
A