Quantum signatures of a molecular nanomagnet in direct magnetocaloric measurements

Joseph W. Sharples, David Collison, Eric J. L. McInnes (), Jürgen Schnack (), Elias Palacios and Marco Evangelisti ()
Additional contact information
Joseph W. Sharples: School of Chemistry and Photon Science Institute, The University of Manchester
David Collison: School of Chemistry and Photon Science Institute, The University of Manchester
Eric J. L. McInnes: School of Chemistry and Photon Science Institute, The University of Manchester
Jürgen Schnack: Faculty of Physics, Bielefeld University
Elias Palacios: CSIC—Universidad de Zaragoza
Marco Evangelisti: CSIC—Universidad de Zaragoza

Nature Communications, 2014, vol. 5, issue 1, 1-6

Abstract: Abstract Geometric spin frustration in low-dimensional materials, such as the two-dimensional kagome or triangular antiferromagnetic nets, can significantly enhance the change of the magnetic entropy and adiabatic temperature following a change in the applied magnetic field, that is, the magnetocaloric effect. In principle, an equivalent outcome should also be observable in certain high-symmetry zero-dimensional, that is, molecular, structures with frustrated topologies. Here we report experimental realization of this in a heptametallic gadolinium molecule. Adiabatic demagnetization experiments reach ~200 mK, the first sub-Kelvin cooling with any molecular nanomagnet, and reveal isentropes (the constant entropy paths followed in the temperature-field plane) with a rich structure. The latter is shown to be a direct manifestation of the trigonal antiferromagnetic net structure, allowing study of frustration-enhanced magnetocaloric effects in a finite system.

Date: 2014
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/ncomms6321 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms6321

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/ncomms6321

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().