Molecule-Based Magnetic Coolers: Measurement, Design and Application

Evangelisti, Marco

doi:10.1007/978-3-642-40609-6_14

Cited by 27 publications

(12 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Magnetocaloric effect, consisting in dependence of entropy on the applied magnetic field, bears high potential for modern applications and attracts rising attention within the community of condensed matter physicists [43,44]. Therefore, one of the highly interesting challenges for physics of molecular magnets is characterization of their magnetocaloric properties and constant search for optimization of the magnetocaloric performance [45][46][47][48][49][50][51][52][53]. Experimental studies focused on such qualities have been reported for some classes of systems, to mention Febased systems [54,55] or Mn-based ones [55][56][57] as well as molecules incorporating Gd [58].…”

Section: Introductionmentioning

confidence: 99%

Magnetocaloric properties of V6 molecular magnet

Kowalewska

Szałowski

2020

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

The paper presents a theoretical study of magnetocaloric properties of polyoxovanadate molecular magnet V6 containing 6 vanadium ions carrying quantum spins S = 1/2. The characteristic property of such structure is the presence of two weakly interacting spin triangles with all-antiferromagnetic couplings. The properties of the system are described using the exact numerical diagonalization approach applied to the quantum Heisenberg model and utilizing a field ensemble formalism. The dependence of the magnetic entropy and magnetic specific heat on the temperature and external magnetic field is calculated and extensively discussed. The magnetocaloric properties are quantified by isothermal entropy change and entropy derivative over the magnetic field. An interesting behaviour of isothermal entropy change is found, with high degree of tunability of the magnetocaloric effect with the initial and final magnetic field values.

show abstract

Section: Introductionmentioning

confidence: 99%

Magnetocaloric properties of V6 molecular magnet

Kowalewska

Szałowski

2020

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

show abstract

“…On the other hand, the possible multifunctionality of molecular magnets [11] opens the way towards numerous applications. Among them, the magnetic cooling based on the magnetocaloric effect (MCE) should be emphasized as particularly interesting application [12][13][14][15]. MCE [16] consists in the dependence of the entropy of substance on the external magnetic field and thus allows designing of a thermodynamic cycle for refrigeration (working between two constant temperatures) or outlining the procedure used to lower the temperature [17].…”

Section: Introductionmentioning

confidence: 99%

Magnetocaloric Effect in Cu5-NIPA Molecular Magnet: A Theoretical Study

Szałowski

Kowalewska

2020

Materials

View full text Add to dashboard Cite

We calculated the magnetocaloric properties of the molecular nanomagnet Cu5-NIPA, consisting of five spins S = 1 / 2 arranged in two corner-sharing triangles (hourglass-like structure without magnetic frustration). The thermodynamics of the system in question was described using the quantum Heisenberg model solved within the field ensemble (canonical ensemble) using exact numerical diagonalization. The dependence of the magnetic entropy and magnetic specific heat on the temperature and the external magnetic field was investigated. The isothermal entropy change for a wide range of initial and final magnetic fields was discussed. Due to plateau-like behavior of the isothermal entropy change as a function of the temperature, a high degree of tunability of magnetocaloric effect with the initial and final magnetic field was demonstrated.

show abstract

“…Frequency-dependent out-of-phase (χ′′M) ac susceptibility signals for Zn6Dy6 in a 3 G oscillating field 55. …”

mentioning

confidence: 99%