Can oxygen vacancy defects lead to emergence of magnetic ordering in perovskite nanostructures even if does not show any magnetic characteristic from ZFC-FC measurement but possess a significant coercivity around 1300 Oe from M-H measurement?
Read the attached article, this may help you.
It is happening even in bulk. Classical overview is Article LaMnO3+δRevisited
https://www.nature.com/articles/s41598-017-04103-y
Yes it can have. Vacant oxygen has a magnetic ordering around 50 K.
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