Surface Investigation on Gd4M8 (M = Zn, Ni) Single Molecule Coolers (pages 4782–4788)
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 and Marco Affronte
Version of Record online: 5 MAY 2014 | DOI: 10.1002/adfm.201400460
Using an appropriate deposition protocol and combined experimental techniques (STM, AFM, XPS, XAS, and XMCD), it is shown, that the Gd4M8 (M = Zn, Ni) molecules remain intact and they preserve their magnetothermal properties when dispersed on gold and graphite substrates. In particular, a remarkable magnetocaloric effect is measured, namely, ΔS = S(6 T) – S(0 T) exceeds 8 R (20 J kg−1 K−1) for Gd4Ni8 at 4 K. These results demonstrate the dealing with single molecule coolers.