Investigation of the physical properties of the tetragonal CeMAl4Si2 (M = Rh, Ir, Pt) compounds

Abstract

The synthesis, crystal structure, and physical properties studied by means of x-ray diffraction, magnetic, thermal and transport measurements of CeMAl${}_4$Si${}_2$ (M = Rh, Ir, Pt) are reported, along with the electronic structure calculations for LaMAl${}_4$Si${}_2$ (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${}_4$Si${}_2$ and CeIrAl${}_4$Si${}_2$ 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${}_4$Si${}_2$ orders ferromagnetically below $T_C$ =3 K with an ordered moment of ${\mu }_{sat}$=0.8 ${\mu }_B$ for a magnetic field applied perpendicular to the $c$-axis. Electronic structure calculations reveal quasi-2D character of the Fermi surface.

References in corpus (4)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Fermi Surface and Quasiparticle Excitations of overdoped Tl2Ba2CuO6+d by ARPES
• Divergence of the Grueneisen Ratio at Quantum Critical Points in Heavy Fermion Metals
• Magnetism and unconventional superconductivity in Ce${}_n$M${}_m$In${}_{3n+2m}$ heavy-fermion crystals

Cited by in corpus (9)

• Reentrant phase transitions of a coupled spin-electron model on doubly decorated planar lattices with two or three consecutive critical points
• Kondo lattice and antiferromagnetic behavior in quaternary CeTAl${}_4$Si${}_2$ (T~=~Rh, Ir) single crystals
• Investigation of the physical properties of the Ce2MAl7Ge4 (M = Co, Ir, Ni, Pd) heavy fermion compounds
• Magnetization processes and existence of reentrant phase transitions in coupled spin-electron model on doubly decorated planar lattices
• Electronic nature of the lock-in magnetic transition in CeXAl4Si2
• Nuclear magnetic resonance investigation of the heavy fermion system Ce${}_2$CoAl${}_7$Ge${}_4$
• Structural and Physical Properties of the Heavy Fermion Metal Ce${}_2$NiAl${}_6$Si${}_5$
• Importance of anisotropic interactions for hard-axis/plane ordering of Ce-based ferromagnets
• Anisotropic spin fluctuations in the triangular Kondo lattice compound CePtAl${}_4$Ge${}_2$ probed by site-selective ${}^{27}$Al NMR