Sample-cooling effects on the field-induced low-temperature magnetic phase in NaO2

Dr Andrej Zorko, Dr Denis Arcon, Mr Tilen Knaflic, Dr Martin Klanjsek, Dr Pabitra Biswas, Dr Peter Adler & Dr Martin Jansen
Molecular solids like sodium superoxide NaO2 possess relatively simple crystal structures, yet their magnetism is surprisingly complex. This is presumably due to the interplay of spin, orbital and lattice degrees of freedom, which leads to intriguing effects related to reorientation of O2- molecular p orbitals. In such cases the cooling procedure leading to the magnetic ground state may be of high relevance. In our previous muSR studies of NaO2, we have discovered an intriguing magnetic...
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