Specific heat of HoZn vs temperature calculated (solid line) at null field. The spontaneous spin reorientation transition (SRT) at T 1=23 K is indicated by the arrow. The dotted line represents calculations considering only exchange and crystal field contributions. Open circles represent experimental data (Ref. 21).
Magnetization of HoZn vs μ 0 H calculated in the directions (solid line), (dashed line), and (dotted line). The symbols represent experimental data (Ref. 23).
Mean values of the second-order operators (solid line), Pxy (dashed line), and Pyz = Pzx (dotted line), calculated as a function of temperature at zero field. The average is null and therefore it is not shown.
(Color online) Magnetization (upper panel) and second-order operator averages (lower panel) vs T calculated for several magnetic fields. (a), (b) Fields of 1 and 3 T were applied in the direction. (c), (d) Fields of 2 and 9 T were applied along the direction. (e), (d) The calculations were performed for µ 0 H =0.3 and =2 T in the direction.
Spin reorientation diagram for HoZn. The magnetic field was applied (a) in the direction, (b) along the direction, and (c) in the one. The lines connecting the symbols are guides for the eyes.
(Color online) (a) Isothermal entropy change and (b) adiabatic temperature change of HoZn calculated under magnetic field variations from 0 to 2 T in the , , and direction. The arrows indicate the spin reorientations observed.
(Color online) Dependence of −ΔST with μ 0ΔH at the several spin reorientations temperatures and at TC , calculated in the (a) , (b) , and (c) directions.
Spin reorientation diagram for ErZn. The magnetic fields were applied (a) in the direction and (b) along the direction. The lines are guides for the eyes.
(Color online) (a) −ΔST and (b) ΔTS of ErZn calculated under several magnetic fields in the (solid lines), (dashed lines), and direction (dotted line).
Comparison of the magnetocaloric properties of some rare-earth-based intermetallic compounds.
Article metrics loading...
Full text loading...