The magnetic structures of RMgSn compounds (R=Ce, Pr, Nd, Tb)

Neutron powder diffraction and Mössbauer spectroscopy (119Snand155Gd) studies of the CeScSi-type GdMgSn and GdMgPb compounds

“…These complementary techniques reveal an incommensurate cycloidal magnetic structure at 5.4 K characterized by an ab-plane orientation of the magnetic moments and propagation vectors k = [0.910,0.077,0] and k = [0.892,0,0] for GdMgSn and GdMgPb, respectively. Similar magnetic structures have been reported for CeScSi-type ErZrSb [7] and TbMgSn [21]. Thus, GdMgSn and GdMgPb are the third and fourth CeScSi-type structure compounds reported to adopt incommensurate cycloidal magnetic structures.…”

“…Neutron powder diffraction studies on the CeScSi-type RMgSn and RMgPb compounds [4,21,22] have revealed relatively complex magnetic structures with similar magnetic arrangements for any given rare-earth element. For example, at very low temperatures PrMgSn, PrMgPb, NdMgSn, and NdMgPb each adopt commensurate antiferromagnetic structures, TbMgSn and TbMgPb adopt incommensurate sine-wave-modulated magnetic structures, and DyMgSn, DyMgPb, HoMgSn, HoMgPb, ErMgSn, and ErMgPb adopt square-wave-modulated magnetic structures [4,22].…”

Chemical bonding in equiatomic cerium intermetallics – The case of CeMgSn, CePdSn, and CeMgPb

“…We have now extended these investigations with a comparative study on CeMgSn [11] vs. CePdSn [18] (Fig. 1), accounting for the substitution of magnesium by palladium.…”

“…Besides the huge number of transition metal containing CeTX phases, few examples are known where the transition metal is substituted by an s or a p element, i. e. the phases CeMgX (X = Ga [4,5], In [6], Tl [7,8], Sn [9][10][11], Pb [12]) or ternary derivatives of AlB 2 and α-ThSi 2 phases like CeGaGe [13], CeSiGe [14], CeAlGa [15], or CeSiGa [16]. Also these equiatomic cerium intermetallics exhibit interesting magnetic properties.…”

Crystal structure and magnetic properties of DyCuxGa2−x (x=0–2.0) antiferromagnetic compounds

“…In the past years, several ternary intermetallic phases (RT x X 2−x ) formed by rare earth metals (R) with transition metals (T) and pblock elements (X) of the Periodic Table, have been studied for the structure and magnetic properties, however, the vast majority of papers focus on the RTX (1:1:1) or the RT 1.5 X 0.5 compounds, including the ternary RCu 0.5 Ga 1.5 systems which crystallize in CaIn 2 -type structure [1][2][3][4][5][6][7][8]17]. The series of RCu 2 intermetallic compounds have the orthorhombic CeCu 2 -type structure with antiferromagnetic (AFM) order at low temperatures [9,10].…”