On the crystal-field-induced magnetic anisotropy in B-substituted RCo₅compounds

Relation between crystal structure and physical properties of Rn+1M5+3nB2n phases

“…This has been discussed in particular in following Refs. [31,32] for the R n+1 Co 3n+5 B 2n compounds. Recently, investigation of the isothermal ternary R-Co-B phase diagram have shown that other phases exists at low temperature [7][8][9], and that the R n+1 Co 3n+5 B 2n phases are part of a larger family of phases: R n+m Co 3n+5m B 2n (the R n+1 Co 3n+5 B 2n phases correspond to m = 1).…”

Magnetization in Y3Co11B4 and Related Compounds

“…This drastic decline in Curie temperature presumably results from weakened Co-Co exchange interactions due to the replacement of Co by B at the 2c sites. The decrease of T, due to decreased Co concentration, 83.3 at% for YCo, and 61.1 at% for Y, Co,,B,, is also observed in G~, + , C O~~+ , B~~ for n = 0, 1, 2, 3, and c c [3].…”

“…The earliest studies of the structural and magnetic properties of R,+ , C O ,~+ 5B2n (R = Sm, Gd) alloys have been carried out Elmasry and Stadelmaier [2] and Smit et al [3]. Recent Mossbauer studies [3] on the Gd,+ ,Co,,+ ,BZn series have shown that boron increases significantly the rare earth sublattice anisotropy via an enhancement of the second-order crystal field parameter at the R sites.…”

Magnetic Anisotropy and Exchange Interactions in Rn+1Co3n+5B2n Compounds

“…These compounds exhibit a strong axial anisotropy for R = Sm [2]. Smit et al [3] determined the crystal field parameters by measuring Mössbauer spectrum of Gdn+1Co3n+5B2n compounds. The strength of the individual contributions to the magnetic anisotropy and magnetic moments of the non-equivalent Co sites in these compounds was studied using nuclear magnetic resonance (NMR) [4,5] and neutron diffraction [6].…”