Interesting thermomagnetic history effects in the antiferromagnetic state of SmMn2Ge2

We present results of magnetization measurements showing that the magnetic response of the antiferromagnetic state of SmMn2Ge2 depends on the path used in the field (H)–temperature (T) phase space to reach this state. A distinct signature of metastability is observed in this antiferromagnetic state when obtained via field-cooling/field-warming paths.