Quantum Magnetism Of Single Molecules And Diluted Rare-Earth Alloys

This paper is a short overview of the works performed with Boris Malkin in a friendly and fruitful collaboration which started fifteen years ago and will, hopefully, be continuing for as many years as possible. Dealing with quantum tunnelling and coherence in non-cooperative magnetic systems such as 3d-based single-molecules or 4f-based diluted alloys, those works also involved our respective students, post-docs and colleagues of the time who all appear in the reference list. If most of those papers were published in usual physics journals, some of them were also published in the proceedings of conferences organized or co-organized by Boris or myself in Kazan, St.Petersburg or Les Houches.