An optical recording medium having a recording layer provided on a substrate, said {HEAD ~ recording layer} comprising {TAIL ~ an organic thin film} containing at least one diazulenium salt compound represented by the formula , or , and a recording method using it 
An optical recording medium having a recording layer provided on a substrate , said { HEAD ~ recording layer } comprising { TAIL ~ an organic thin film } containing at least one diazulenium salt compound represented by the formula , or , and a recording method using it
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