The effect of trace iron in the magnetic property of the fine particle prepared by ArF laser-induced ablative photodecomposition of solid perylenetetracarboxylic dianhydride

Organic fine particles were prepared by ArF laser-induced ablative photodecomposition of 3,4,9,10-perylenetetracarboxylic dianhydride containing trace amount of iron (3.5 similar to 2200 ppm). Sudden change in the magnetic property of the particles, from diamagnetic to paramagnetic, was observed between the iron content of 2000 and 2100 ppm.