Magnetic studies of intermetallic compounds Al3R (Al11R3) both in the solid and liquid states

Crystallization kinetics of Al86Ni8Gd6 amorphous alloy

“…This result agrees with the conjecture concerning the electronic structure and chemical short-range order of Al-RE-based alloys which was suggested in [23][24][25]. The detailed investigation of this issue is the matter of separate work.…”

Magnetic susceptibility and parameters of electronic structure of Al2R (R = La, Ce, Sm, Gd, Dy, Ho, Yb) intermetallic compounds at high temperatures.

“…It means that in these compounds rare earth atoms exist not in form R 3+ , as it was previously thought [8,9,11], but create some directed 01023-p.3 EPJ Web of Conferences bonds of covalent type with aluminum atoms. The situation is similar to described in [1,4]. 4f-electrons are involved into bonds formation and that is why their partial delocalization from REM atoms takes place.…”

“…to formation of global nets and chains that provide high glass forming ability of the melt. Our previous experimental and theoretical investigations showed that in liquid dilute Al-REM alloys and first intermetallic compounds Al 11 REM 3 or Al 3 REM, associates Al 2 REM exist even at high overheating above liquidus [1,4]. From thermodynamics modeling results it comes that they can exist in melts even at temperatures higher than 2000 K [5].…”

“…According to contemporary views, the main cluster forming element for Al-REM melts is the so-called "quasimolecules" Al 2 REM [1][2][3][4]. These associates have a tendency to polymerization, i.e.…”

“…For dilute Al-REM alloys and first intermetallic compounds an important fact was discovered -the value of effective magnetic moment per rare earth atom is substantially lower than for the free ion R 3 + [1,3,4]. 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 4f-electrons into chemical bonds formation affects significantly the effective magnetic moment per REM atom.…”