The magnetism of Tb(Ni1-xCux)5 compounds

Magnetic properties, crystal and electronic structure of GdNi5−Cu series

“…There exist two crystallographic inequivalent Ni sites: 2c (1/3 2/3 0) in the basal plane layer z = 0 of mixed atoms (Gd + Ni) and 3g (1/2 0 1/2) in the interleaving layer (Kagome net) at z = 1/2. The different ranges of solid solutions for the LaNi 5−x Cu x and TbNi 5−x Cu x series show that copper substitutes for nickel at both positions 2c and 3g with preference to the 2c sites [2,7,8].…”

“…Much more interesting is the GdCu 5 ment below T N = 26 K and a quite unusual behaviour of (T) below 30 K. These features are probably connected with its helimagneticlike structure [5]. The Ni/Cu substitution in the RNi 5−x Cu x series is reflected in the different magnetic properties depending on the type of R atom [3,4,7,8]. These properties are closely connected with crystal field effects, band magnetism and band structure.…”

“…The RM 5 group of compounds where R is a rare earth and M is a 3d transition metal has been extensively studied in the past due to their interesting magnetic properties [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Almost all compounds with M = Ni crystallize in the hexagonal CaCu 5 type of crystal structure (P6/mmm space group), but some of them with e.g.…”

“…For middle rare earths (Gd, Tb, Dy) both structures can exist, depending on heat treatment given to the samples [6,11]. Different ranges of solid solutions for LaNi 5−x Cu x and TbNi 5−x Cu x show the presence of the CaCu 5 type of structure in which copper substitutes for nickel at both positions 2c and 3g with a preference the 2c sites [7,8].…”

TbxEr1−xNi5compounds: An ideal model system for competing Ising-Пирогов1, Park2, Ermolenko3 et al. 2009Phys. Rev. B

“…Hence, it is not surprising that there is indeed controversy in the literature with regard to the magnetic states of Tb͑Ni 1−x Cu x ͒ 5 compounds. 33,35 A collinear ferromagnetic structure was inferred in Ref. 33 from neutron-diffraction data on the compounds with x = 0.3 and 0.4, while in Ref.…”