Surface Investigation on Gd4M8 (M = Zn, Ni) Single Molecule Coolers

Valdis Corradini, Alberto Ghirri, Andrea Candini, Roberto Biagi, Umberto del Pennino, Valentina De Renzi, Gianluca Dotti, Edwige Otero, Thomas N. Hooper, Ross Inglis, Euan K. Brechin, Marco Affronte*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Proving the preservation of functionality at the molecular scale is still a major challenge, both for the choice of suitable derivatives and protocols and for the employed experimental tools and methods. By using a combined scanning probe (AFM and STM) and spectroscopic methodology (XPS, XAS and XMCD), it is shown that Gd4M8 derivatives (with M = Zn2+, Ni2+) are robust molecular units which preserve their electronic, magnetic, and thermodynamic properties when deposited on a metallic surface. Namely, entropy variation. Delta S = [S(6 T) - S(0T)] exceeding 8 R (20 J kg(-1) K-1) at 4 K in isolated Gd4Ni8 molecules dispersed on Au(111) surface is measured and a viable route to exploit large magnetocaloric effect at single molecule level is shown.

Original languageEnglish
Pages (from-to)4782-4788
Number of pages7
JournalAdvanced Functional Materials
Volume24
Issue number30
DOIs
Publication statusPublished - 13 Aug 2014

Keywords

  • Magnetocaloric effects
  • Molecular magnetism
  • X-ray spectroscopies

Fingerprint

Dive into the research topics of 'Surface Investigation on Gd4M8 (M = Zn, Ni) Single Molecule Coolers'. Together they form a unique fingerprint.

Cite this