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Title: The influence of hydrostatic pressure on the magnetic and magnetocaloric properties of DyRu 2Si 2

In this paper, we report the magnetic and magnetocaloric properties of the tetragonal rare-earth compound DyRu 2Si 2 under applied hydrostatic pressure. The isothermal entropy change (ΔS) and the adiabatic temperature change (ΔT ad) were calculated from magnetization data collected at different applied pressures and from heat capacity measurements conducted at atmospheric pressure, respectively. The application of hydrostatic pressure significantly modified the multi-step magnetization curve and the saturation magnetization. A suppression of the magnetization was observed for P = 0.588 GPa and P = 0.654 GPa whereas, at about P ≈1 GPa, the saturation magnetization increased and the magnetization isotherms again resembled the curves measured at atmospheric pressure. A small thermal hysteresis was observed between the heating and cooling M(T) curves at T t=3.4 K, with an applied magnetic field of H = 0.1 T. This thermal hysteresis indicates a first-order like transition which was also supported by the Arrott plot analysis. Finally, the volume magnetostriction was estimated from the pressure-dependent magnetization measurements using a Maxwell relation.
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  1. Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy
  2. Southern Illinois Univ., Carbondale, IL (United States). Dept. of Physics
Publication Date:
Grant/Contract Number:
FG02-13ER46946; FG02-07ER46420; FG02-06ER46291; 1306392
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 121; Journal Issue: 4; Journal ID: ISSN 0021-8979
American Institute of Physics (AIP)
Research Org:
Louisiana State Univ., Baton Rouge, LA (United States); Southern Illinois Univ., Carbondale, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
Country of Publication:
United States
36 MATERIALS SCIENCE; magnetization measurement; atmospheric pressure; atmospheric temperature; high pressure; hydrostatics; magnetostriction; saturation moments; entropy; heat capacity; magnetic fields
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1361749