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Magnetic refrigeration and spin-lattice relaxation in gadolinium-based molecular nanomagnets

AutorLuis, Fernando; Evangelisti, Marco
Palabras clavePolyoxometalate
Molecular nanomagnet
Magnetocaloric effect
Quantum tunneling
Spin dynamics
Fecha de publicación2015
CitaciónMolecular Nanomagnets and Related Phenomena: 431-460 (2015)
SerieStructure and Bonding 164
ResumenWe review history, materials and underlying physics that form a background common to magnetic refrigeration and spin-lattice relaxation. To illustrate how these subjects are profoundly interrelated with each other, we describe studies performed on the molecular nanomagnets with formula [Gd(WO)] and [Gd(PWO)]. Each molecular unit carries a single ion of gadolinium, which is coordinated to different polyoxometalate moieties, respectively. Each Gd spin is magnetically isolated and maintains thermal equilibrium with the lattice down to temperatures close to absolute zero. For T 200 mK, the spin-lattice relaxation becomes dominated by pure quantum tunneling events. We discuss these properties with a keen eye for promising applications of molecular nanomagnets, namely, as magnetic refrigerants for attaining such low temperatures and spin qubits in quantum information processing.
Identificadoresdoi: 10.1007/430-2014-152
isbn: 978-3-662-45722-1
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