skip to main content

Title: Investigation of the physical properties of the tetragonal CeMAl 4Si 2 (M = Rh, Ir, Pt) compounds

The synthesis, crystal structure and physical properties studied by means of x-ray diffraction, magnetic, thermal and transport measurements of CeMAl 4Si 2 (M = Rh, Ir, Pt) are reported, along with the electronic structure calculations for LaMAl 4Si 2 (M = Rh, Ir, Pt). These materials adopt a tetragonal crystal structure (space group P4/mmm) comprised of BaAl 4 blocks, separated by MAl 2 units, stacked along the c-axis. Both CeRhAl 4Si 2 and CeIrAl 4Si 2 order antiferromagnetically below T N1 = 14 and 16 K, respectively, and undergo a second antiferromagnetic transitition at lower temperature (T N2 = 9 and 14 K, respectively). CePtAl 4Si 2 orders ferromagnetically below T C = 3 K with an ordered moment of μ sat = 0.8 μ B for a magnetic field applied perpendicular to the c-axis. Electronic structure calculations reveal quasi-2D character of the Fermi surface.
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 0953-8984
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Journal of Physics. Condensed Matter
Additional Journal Information:
Journal Volume: 27; Journal Issue: 2; Journal ID: ISSN 0953-8984
IOP Publishing
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
Country of Publication:
United States
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Ce-based intermetallic compounds; heavy-fermions; electronic-anisotrophy