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Keywords:

  • molecular nanomagnets;
  • gadolinium;
  • magnetocaloric effect;
  • magnetic force microscopy;
  • dip-pen nanolithography
Thumbnail image of graphical abstract

An excellent molecule-based cryogenic magnetic refrigerant, gadolinium acetate tetrahydrate, is here used to decorate selected portions of silicon substrate. By quantitative magnetic force microscopy for a variable applied magnetic field near liquid-helium temperature, the molecules are demonstrated to hold their magnetic properties intact, and therefore their cooling functionality, after their deposition. These results represent a step forward towards the realization of a molecule-based micro-refrigerating device at very low temperatures.