Ferromagnetic order in a Fe(110) monolayer on W(110) by Mössbauer spectroscopy

Abstract

Ferromagnetic order in Fe(110) monolayers on W(110) was analyzed with use of conversion electron Mössbauer spectroscopy. The Ag-coated monolayer is ferromagnetic up to ${\mathrm{T}}_{\mathrm{C}}$(1)=296 K=0.28${\mathrm{T}}_{\mathrm{C}}$(∞). The gross shape of ${\mathrm{B}}_{\mathrm{hf}(\mathrm{T}}$) resembles that of bulk material. ${\mathrm{B}}_{\mathrm{hf}(0\mathrm{}}$) is reduced to 11.9±0.3 T. In the critical region 275 K≤T≤295 K, a continuous transition from a magnetic to a nonmagnetic component takes place. For the uncoated monolayer, the ground-state hyperfine field and Curie temperature are reduced to ${\mathrm{B}}_{\mathrm{hf}\mathrm{}\left(0\right)=10\mathrm{}\pm 1}$ T and ${\mathrm{T}}_{\mathrm{C}}$(1)=210 K=0.20${\mathrm{T}}_{\mathrm{C}}$(∞), respectively.