The magnetic structure factors determined using polarized-neutron scattering have been employed to analyze the magnetic-moment distribution of Mn in MnX3 alloys (X = Ni,Pt). In particular, a spin-density measurement in MnNi3.55 at a low degree of long-range order has been performed at room temperature. Results suggest that Mn is found in a high-magnetic-moment state in this class of compounds, independently of the system, thus indicating a small dependence of the magnetic state on the atomic volume. Furthermore, a rather direct evidence of the presence of Mn atoms having a negative magnetic moment is also obtained. The information, which can be derived on the electron distribution in fcc Mn, is also discussed in a phenomenological fashion.
Spin density in MnNi3.55: A magnetic state of fcc manganese
PETRILLO, Caterina;SACCHETTI, Francesco;
1991
Abstract
The magnetic structure factors determined using polarized-neutron scattering have been employed to analyze the magnetic-moment distribution of Mn in MnX3 alloys (X = Ni,Pt). In particular, a spin-density measurement in MnNi3.55 at a low degree of long-range order has been performed at room temperature. Results suggest that Mn is found in a high-magnetic-moment state in this class of compounds, independently of the system, thus indicating a small dependence of the magnetic state on the atomic volume. Furthermore, a rather direct evidence of the presence of Mn atoms having a negative magnetic moment is also obtained. The information, which can be derived on the electron distribution in fcc Mn, is also discussed in a phenomenological fashion.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
