Abstract
Magnetic properties of intermetallic compounds Al2R (R = La, Ce, Sm, Gd, Dy, Ho, Yb) are investigated in a wide temperature (20-1650 0 C) and magnetic fields (0,3-1,3 T) ranges. For all the samples the increase of magnetic susceptibility with temperature growth was found in liquid state. From experimental data several parameters of electronic structure of the compounds were obtained. In particular, it was shown that the values of effective magnetic moment per rare earth atom in compounds are lower than for ion R 3+ .
Highlights
According to contemporary views, the main cluster forming element for Al-REM melts is the so-called “quasimolecules” Al2REM [1,2,3,4]
The temperature dependences of magnetic susceptibility in investigated intermetallic compounds are presented at figures 1 – 4
Magnetic susceptibility was found to be independent on time within mentioned error bars ( 2 %)
Summary
The main cluster forming element for Al-REM melts is the so-called “quasimolecules” Al2REM [1,2,3,4]. These associates have a tendency to polymerization, i.e. to formation of global nets and chains that provide high glass forming ability of the melt. The idea was suggested that in alloys and compounds with aluminum REM atoms exist not in trivalent ion form, but create chemical bonds of covalent – metallic type with the participation of 4f-electrons.The involvement of 4felectrons into chemical bonds formation affects significantly the effective magnetic moment per REM atom. The decay of Al2REM associates, i.e. the destruction of the directed bonds, begins above the melting temperature of Al2REM compounds; 4f-electrons are localizing on atoms, changing the magnetic moment per REM atom significantly, which in turn affect the total magnetic susceptibility of an alloy - a sharp increase in χ values takes place
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
