Magnetic structures and magnetic phase transitions in Ho3Co

Field-induced magnetic phase transitions and metastable states in Tb3Ni

“…The saturation of the resistivity observed in numerous R 3 T compounds was also ascribed to the short-range magnetic order persisting up to temperatures well above Néel temperature and s-d scattering mechanism [6,27]. The complex multi-component incommensurate magnetic structures observed in R 3 T with non-Kramers R ion apparently arise from the competition of exchange interactions of different types and lowsymmetry crystal electric field [6,[12][13][14][15].…”

“…Among the rare-earth intermetallic compounds, R 3 T (T = Co, Ni) compounds possess the highest content of rare-earth metal within the binary R − T systems and exhibit a rich variety of physical properties: unconventional superconductivity [7,8], charge density wave [9], giant magnetoresistance effect [10,11], multi-component magnetic structures exhibiting coexistence of commensurate and incommensurate propagation vectors [12,13], field-induced magnetic phase transitions [13][14][15][16] and giant magnetocaloric effect [17][18][19][20]. R 3 T compounds crystallize in a low-symmetry orthorhombic structure of the Fe 3 C type described with the space group P nma [21].…”

Single-crystal neutron diffraction study of the magnetic structure ofEr3Co

“…However, more recent studies using new generation of neutron-scattering techniques have revealed that some of R 3 Co͑R =Ho, Tb͒ compounds exhibit much more complex magnetic structures. 5,6 The structures turn out to be incommensurate not only just below the magnetic ordering point but down to the lowest temperatures as well. We proposed recently that the non-Kramers character of the rare-earth ions is responsible for the incommensurability of the magnetic structures of these R 3 T compounds at low temperatures.…”

“…The commensurate magnetic structures ͑although, different from Er 3 Co case͒ were also found in other R 3 Co compounds with Kramerstype ions, R = Dy and Nd. 3,11 This is in contrast to the incommensurate magnetic structure established for the systems with non-Kramers rare earth, e.g., Ho 3 Co and Tb 3 Co. 5,6 The type of the magnetic structure within R 3 Co series can be understood on the base of the periodic field model which takes into account the periodic exchange field and CEF effects. 12 According to this model an incommensurable magnetic structure may be observed down to low temperatures when a non-Kramers R 3+ ion has a nonmagnetic singlet ground state due to splitting of the multiplet by lowsymmetry CEF.…”

Magnetic properties and magnetocaloric effects in Er3−xGdxCo intermetallic compounds

“…R 3 Co (R ¼ rare earth, Ho, Er, and Gd)-type compounds with Fe 3 C-type orthorhombic crystallographic structure have attracted much attention due to the large and reversible magnetic entropy change DS M arising from the highest rare content and second order magnetic phase transition. [16][17][18][19] However, their magnetic properties, such as magnetic transition temperature, are quite different due to various rare earth ions. For instance, Er 3 Co exhibits ferromagnetic like (FM-like) magnetic ordering at 14 K (Ref.…”