164044 20251121161351.0 doi 10.1002/adma.202511061 sideral 146307 ART-2025-146307 eng Palacios, Elías (orcid)0000-0003-3567-7030 Self‐Cooling Molecular Spin Qudits 2025 The need of operating molecular spin qubits at very low temperatures constitutes a technological limitation. This challenge is addressed by integrating, in the same material and at the molecular scale, quantum processing and magnetic refrigeration capabilities. The molecular unit is a [GdEr] heterolanthanide coordination complex, where Er(III) encodes a qubit while Gd(III) provides a large magnetocaloric effect. The properties of each component are separately studied in isostructural [LaEr] and [GdLu] complexes, where each functional ion lies next to a diamagnetic metal. All complexes are characterized by magnetic, heat capacity, and EPR measurements. The results show that the presence of both ions in the same molecule has a synergic effect on both functionalities. Thus, the coupling between Er(III) and Gd(III) spins lifts any level degeneracies even close to zero magnetic field, leading to a d = 16 set of spin states that, as revealed by pulse EPR measurements, can be coherently manipulated. In turn, Er(III) enhances the magnetocaloric effect compared to [GdLu], extending it to lower temperatures. This is corroborated by direct magnetocaloric measurements, which show the ability of this material to cool itself, and a device, down to temperatures as low as 0.4 K. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/AEI/AEI PID2022-140923NB-C21 info:eu-repo/grantAgreement/ES/DGA/E09-23R-QMAD info:eu-repo/grantAgreement/ES/DGA/E11-23R-M4 info:eu-repo/grantAgreement/ES/DGA/E31-23R-PLATON info:eu-repo/grantAgreement/ES/MICINN/CEX2023-001286-S info:eu-repo/grantAgreement/ES/MICINN/PDC2022-133184-I00 info:eu-repo/grantAgreement/ES/MICINN/PID2020-1183294RB-I00 info:eu-repo/grantAgreement/ES/MICINN/PID2021-124734OB-C21 info:eu-repo/grantAgreement/ES/MICINN/PID2022-137764OB-I00 info:eu-repo/grantAgreement/EUR/MICINN/TED2021-129214B-I00 info:eu-repo/grantAgreement/EUR/MICINN/TED2021-131447B-C21 info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Aguilà, David Gracia, David Maniaki, Diamatoula Barrios, Leoní A. Chiesa, Alessandro Martínez, Jesús I. Universidad de Zaragoza (orcid)0000-0002-5406-3280 Novikov, Valentin Roubeau, Olivier (orcid)0000-0003-2095-5843 Carretta, Stefano Evangelisti, Marco (orcid)0000-0002-8028-9064 Aromí, Guillem Luis, Fernando (orcid)0000-0001-6284-0521 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada (2025), e11061 [7 pp.] Adv. mater. Advanced materials 0935-9648 2160142 http://zaguan.unizar.es/record/164044/files/texto_completo.pdf Versión publicada 2961858 http://zaguan.unizar.es/record/164044/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:164044 articulos driver 2025-11-21-14:25:23 ARTICLE