磁滞回线作为区分单层和多层石墨结构的探针
Magnetic hysteresis loop as a probe to distinguish single layer from many layer graphitic structure
摘要：
本文指出，磁滞回线可以作为区分单层石墨结构和多层石墨结构的探针。在化学方面，我们合成了氧化石墨（GO）和还原氧化石墨（RGO）。我们观察到铁磁性的磁滞回线的GO和RGO低于一定的应用临界磁场，并在此临界场以上，我们观察到交叉的正磁化到负磁化，导致抗磁行为。这种交叉对于多层石墨结构的情况更占主导地位。GO在空气中退火后，多层石墨结构的临界交叉场降低，磁化强度增加。所有这些观察和现象的可能原因在这里提出。
英文摘要：
In this report we have pointed out that magnetic hysteresis loop can be used as a probe to distinguish a single layer from a many layer graphitic structure. Chemically we have synthesized graphitic oxide (GO) and reduced graphitic oxide (RGO) for this investigation. We observe ferromagnetic like hysteresis loops for both GO and RGO below a certain applied critical magnetic field and above this critical field we observe cross-over of the positive magnetization to negative magnetization leading to diamagnetic behaviour. This cross-over is more dominant for the case of many layer graphitic structure. Upon annealing of GO in air the critical cross-over field decreases and the magnetization increases for multilayer graphitic structure. Possible reasons for all these observations and phenomena is presented here.
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