000170302 001__ 170302
000170302 005__ 20260410165451.0
000170302 0247_ $$2doi$$a10.1063/5.0316768
000170302 0248_ $$2sideral$$a148856
000170302 037__ $$aART-2026-148856
000170302 041__ $$aeng
000170302 100__ $$aGracia, David
000170302 245__ $$aLarge sub-Kelvin magnetocaloric effect and phase behavior of gadolinium nitrate hexahydrate
000170302 260__ $$c2026
000170302 5060_ $$aAccess copy available to the general public$$fUnrestricted
000170302 5203_ $$aWe report a comprehensive magnetothermal study of the classical gadolinium salt [Gd(NO3)3] · 6H2O at temperatures approaching absolute zero. Despite its long-standing availability as a commercial compound, its magnetocaloric properties have remained unexplored. Using electron paramagnetic resonance, magnetic susceptibility, heat capacity, and direct measurements of the magnetocaloric effect, we reveal that weak dipolar interactions combined with axial crystal-field anisotropy drive antiferromagnetic ordering at TN = 0.21 K. Remarkably, [Gd(NO3)3] · 6H2O exhibits an isothermal magnetic entropy change of −ΔSm = 26.1 J K−1 kg−1 at T = 0.6 K for a modest field variation of ΔB = 1 T and an adiabatic temperature change of ΔTad = 5.0 K at T = 1.6 K for the same ΔB, placing its performance among the strongest reported for Gd-based refrigerants under comparable low-field and sub-Kelvin conditions. These results provide a reference for understanding magnetocaloric behavior in hydrated salts and highlight the interplay between dipolar coupling and crystal-field anisotropy.
000170302 536__ $$9info:eu-repo/grantAgreement/EC/H2020/101119865/EU/Molecule-based magneto/electro/mechano-Calorics/MSCA-DN MolCal$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 101119865-MSCA-DN MolCal$$9info:eu-repo/grantAgreement/ES/MCIU/PID2024-159457OB-C21$$9info:eu-repo/grantAgreement/ES/MICIU/CEX2023-001286-S
000170302 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es
000170302 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000170302 700__ $$aUbach I Cervera, Marc
000170302 700__ $$aCharkiolakis, Emmanouil K.
000170302 700__ $$0(orcid)0000-0002-1827-1250$$aGarcía-Rubio, Inés
000170302 700__ $$aMilios, Constantinos J.
000170302 700__ $$0(orcid)0000-0002-8028-9064$$aEvangelisti, Marco
000170302 773__ $$g14, 3 (2026), [8 pp.]$$pAPL mater.$$tAPL Materials$$x2166-532X
000170302 8564_ $$s4789945$$uhttps://zaguan.unizar.es/record/170302/files/texto_completo.pdf$$yVersión publicada
000170302 8564_ $$s1040960$$uhttps://zaguan.unizar.es/record/170302/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000170302 909CO $$ooai:zaguan.unizar.es:170302$$particulos$$pdriver
000170302 951__ $$a2026-04-10-13:46:11
000170302 980__ $$aARTICLE