TY - JOUR
T1 - Magnetocaloric Properties of R3Ga5 O12 (R=Tb, Gd, Nd, Dy)
AU - Kleinhans, M.
AU - Eibensteiner, K.
AU - Leiner, J. C.
AU - Resch, C.
AU - Worch, L.
AU - Wilde, M. A.
AU - Spallek, J.
AU - Regnat, A.
AU - Pfleiderer, C.
N1 - Publisher Copyright:
© 2023 American Physical Society.
PY - 2023/1
Y1 - 2023/1
N2 - We report the characteristic magnetic properties of several members of the family of rare-earth garnets, Gd3Ga5O12 (GGG), Dy3Ga5O12, Tb3Ga5O12, and Nd3Ga5O12, and compare their relative potential utility for magnetocaloric cooling, including their minimal adiabatic demagnetization refrigeration (ADR) temperatures and relative cooling parameters. A main objective of this work concerns the identification of potential improvements over the magnetocaloric properties of GGG for use in low-temperature ADR cryostats. Using Tb+3 and Dy+3 at the rare-earth site offers, in principle, a higher saturation magnetization and Nd+3 gives a lower de Gennes factor and therefore potentially reduced magnetic transition temperatures, limiting the useful temperature range. Our results show that Dy3Ga5O12 yields an optimal relative cooling parameter at low applied fields and low limiting temperatures, which would allow for the design of more efficient ADR cryostats.
AB - We report the characteristic magnetic properties of several members of the family of rare-earth garnets, Gd3Ga5O12 (GGG), Dy3Ga5O12, Tb3Ga5O12, and Nd3Ga5O12, and compare their relative potential utility for magnetocaloric cooling, including their minimal adiabatic demagnetization refrigeration (ADR) temperatures and relative cooling parameters. A main objective of this work concerns the identification of potential improvements over the magnetocaloric properties of GGG for use in low-temperature ADR cryostats. Using Tb+3 and Dy+3 at the rare-earth site offers, in principle, a higher saturation magnetization and Nd+3 gives a lower de Gennes factor and therefore potentially reduced magnetic transition temperatures, limiting the useful temperature range. Our results show that Dy3Ga5O12 yields an optimal relative cooling parameter at low applied fields and low limiting temperatures, which would allow for the design of more efficient ADR cryostats.
UR - http://www.scopus.com/inward/record.url?scp=85146372324&partnerID=8YFLogxK
U2 - 10.1103/PhysRevApplied.19.014038
DO - 10.1103/PhysRevApplied.19.014038
M3 - Article
AN - SCOPUS:85146372324
SN - 2331-7019
VL - 19
JO - Physical Review Applied
JF - Physical Review Applied
IS - 1
M1 - 014038
ER -