ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We experimentally investigated the magnetic phase transition of the in-plane magnetized double-layer Fe on W(100). This epitaxial system approximates the theoretical two-dimensional (2D) XY model to a large extent because of its pseudomorphic growth and structural stability. We measured the magnetization of W(100)/Fe in the vicinity of the Curie temperature TC using the diffraction of spin polarized electrons and the magnetization of W(100)/Fe/Ag in a wider temperature interval using conversion electron Mössbauer spectroscopy. The temperature dependence of the spontaneous magnetization follows a power law with an exponent β=0.22±0.03 in the temperature regime 0.3≤T/TC≤0.99. The susceptibility χ(T(approximately-greater-than)TC) can be fitted alternatively by a power law with an unusually large exponent γ≈5 or by an exponential law χ∝exp(b/(square root of)T−TC), as predicted for the 2D XY model, with b=1.6. © 1996 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.361923
