Magnetocaloric effect in gadolinium-oxalate framework Gd{sub 2}(C{sub 2}O{sub 4}){sub 3}(H{sub 2}O){sub 6}⋅(0{sub ⋅}6H{sub 2}O)

Journal Article · Mon Dec 01 04:00:00 EST 2014 · APL materials

DOI:https://doi.org/10.1063/1.4900884· OSTI ID:22415231

Sibille, Romain; Didelot, Emilie; Mazet, Thomas; Malaman, Bernard; François, Michel ^[1]

---

1. Institut Jean Lamour–UMR 7198, Université de Lorraine, BP 70239, 54506 Vandoeuvre-lès-Nancy Cedex (France)

Magnetic refrigerants incorporating Gd{sup 3+} ions and light organic ligands offer a good balance between isolation of the magnetic centers and their density. We synthesized the framework material Gd{sub 2}(C{sub 2}O{sub 4}){sub 3}(H{sub 2}O){sub 6}⋅0.6H{sub 2}O by a hydrothermal route and characterized its structure. The honeycomb lattice of Gd{sup 3+} ions interlinked by oxalate ligands in the (a,c) plane ensures their decoupling in terms of magnetic exchange interactions. This is corroborated by magnetic measurements indicating negligible interactions between the Gd{sup 3+} ions in this material. The magnetocaloric effect was evaluated from isothermal magnetization measurements. The maximum entropy change −ΔS{sub M}{sup max} reaches 75.9 mJ cm{sup −3} K{sup −1} (around 2 K) for a moderate field change (2 T)

• OSTI ID: 22415231
• Journal Information: APL materials, Journal Name: APL materials Journal Issue: 12 Vol. 2; ISSN AMPADS; ISSN 2166-532X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DECOUPLING
ENTROPY
EXCHANGE INTERACTIONS
GADOLINIUM COMPOUNDS
GADOLINIUM IONS
HYDRATES
LIGANDS
MAGNETIC PROPERTIES
MAGNETIZATION
OXALATES
REFRIGERANTS
VISIBLE RADIATION