Abstract
Single crystals of Ce 2PdGa 12 have been synthesized in Ga flux and characterized by X-ray diffraction. This compound crystallizes in the tetragonal P 4 / nbm space group, Z = 2 with lattice parameters of a = 6.1040 ( 2 ) Å and c = 15.5490 ( 6 ) Å . It shows strongly anisotropic magnetism and orders antiferromagnetically at T N∼11 K. A field-induced metamagnetic transition to the ferromagnetic state is observed below T N. Structure–property relationships with the related heavy-fermion antiferromagnet CePdGa 6 are discussed.
Highlights
Ce-based intermetallic compounds have attracted interest because of their variety of electronic properties
Flux growth methods using a 1:1:20 ratio of Ce:Pd:Ga and a heat treatment up to 1423 K followed by cooling at a rate of 8 K/h and centrifugation at 623 K yielded a mixture of CePdGa6 and Ce2PdGa12
In order to compare the magnetic data of CePdGa6 and Ce2PdGa12, we have re-measured the magnetization on single crystals of single-phase CePdGa6 and Ce2PdGa12
Summary
Ce-based intermetallic compounds have attracted interest because of their variety of electronic properties. The search for new layered materials is important in exploring new heavy fermion superconductors and in deepening our understanding of the role of structural dimensionality. This is the case for the highest Tc to date, of a Ce-based heavy fermion superconductor, which is found in the layered CeCoIn5 (Tc 1⁄4 2:3 K) [2]. We have previously reported the synthesis and structure of a new Ce-based layered intermetallic compound, CePdGa6, and its La-analog [3]. Magnetic and specific heat measurements suggest an antiferromagnetic (AF) ground state of Ce2PdGa12, whose spin configuration transforms from a collinear AF to a canted one on lowering temperature. We will discuss the structure–property relationships with the related heavy-fermion antiferromagnet CePdGa6
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