Magnetic properties of new ternary silicides: Tb/sub 2/Ir/sub 3/Si/sub 5/ and both polymorphic forms of TbIr/sub 2/Si/sub 2/

Journal Article · Fri Jun 01 00:00:00 EDT 1984 · Mater. Res. Bull.; (United States)

DOI:https://doi.org/10.1016/0025-5408(84)90029-1· OSTI ID:5078252

Hirjak, M; Chevalier, B; Etourneau, J; Hayenmuller, P

A new ternary silicide Tb/sub 2/Ir/sub 3/Si/sub 5/ of U/sub 2/Co/sub 3/Si/sub 5/-type structure has been prepared as well as two polymorphic forms of TbIr/sub 2/Si/sub 2/. Both modifications are tetragonal; the low and high-temperature forms are isostructural with ThCr/sub 2/Si/sub 2/ and CaBe/sub 2/Ge/sub 2/, respectively. The three compounds order antiferromagnetically. A high Neel temperature is observed for the low-temperature modification (T /sub N/ = 80K, thetap = 42K). Its magnetic structure is similar to that of TbRh/sub 2/Si/sub 2/ for which ferromagnetic layers perpendicular to the c-axis are coupled antiferromagnetically (+-+-). Tb/sub 2/Ir/sub 3/Si/sub 5/ and the high-temperature modification of TbIr/sub 2/Si/sub 2/ have low T /sub N/ and thetap values. The difference observed in the magnetic behavior of these compounds is likely due to the influence of the environment of the Tb/sup 3 +/ ion on the state density at the Fermi level.

• Research Organization: Laboratoire de Chimie du Solide du C.N.R.S. Universite de Bordeaux
• OSTI ID: 5078252
• Journal Information: Mater. Res. Bull.; (United States), Vol. 19:6
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRIDIUM SILICIDES
CHEMICAL PREPARATION
CRYSTAL GROWTH
MAGNETIC PROPERTIES
TERBIUM COMPOUNDS
TERBIUM SILICIDES
BERYLLIUM COMPOUNDS
CALCIUM COMPOUNDS
CHROMIUM SILICIDES
GERMANIUM COMPOUNDS
TETRAGONAL LATTICES
THORIUM SILICIDES
ACTINIDE COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CHROMIUM COMPOUNDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
IRIDIUM COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
SILICIDES
SILICON COMPOUNDS
SYNTHESIS
THORIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360602* - Other Materials- Structure & Phase Studies
360603 - Materials- Properties