Itinerant electron ferromagnetism in Sr<SUP>2+</SUP>-, Ca<SUP>2+</SUP>-, and Ba<SUP>2+</SUP>-doped rare-earth orthocobaltites (Ln<SUP>3+</SUP><SUB>1−x</SUB>M<SUP>2+</SUP><SUB>x</SUB>CoO<SUB>3</SUB>)
- Rao, C. N. R.
- Parkash, Om
- Bahadur, D.
- Ganguly, P.
- Nagabhushana, S.
DOIAbstract
Electronic and magnetic properties of Ln1−xSrxCoO3 (Ln=Pr, Nd, Sm, Eu, and Gd) systems show that above a critical value of x, the d electrons become itinerant while the materials become ferromagnetic at low temperatures. The ferromagnetic component increases with increase in x and decrease in temperature. The Curie temperature increases with x and decreases with decrease in the size of the rare-earth ion. Incorporation of Ba2+ in LaCoO3 favors itinerant electron ferromagnetism relative to Sr2+ while Ca2+ is less favorable than Sr2+
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