{'fraction_non_alphanumeric': 0.048462255358807084, 'fraction_numerical': 0.02702702702702703, 'mean_word_length': 4.451776649746193, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 1, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Role of the rare-earth ion on the strength of the ferromagnetic exchange interactions in RMn0.5M0.5O3 (M = Co, Ni)

The role of the trivalent rare-earth ion on the paramagnetic to ferromagnetic transition temperature (Tc) of the substituted perovskite-type rare-earth (R) manganese oxides, RMn0.5Co0.5O3 and RMn0.5Ni0.5O3 (R = Pr, Nd, Sm, Eu, Gd, Tb, Dy, Er and Yb), is compared. For a particular R3+ with larger ionic size, the Tc of RMn0.5Ni0.5O3 is larger than that of RMn0.5Co0.5O3 and vice versa for smaller ionic size, though the ionic sizes of trivalent low-spin Co and Ni ions are comparable. Tc values of both Co and Ni containing compositions decrease with the decrease in the ionic size of R3+, showing a faster decrease for heavier rare-earth ions beyond Gd3+. Though the decreasing size of the rare-earth ion is responsible for the decrease in the magnetic transition temperature, due to structural distortions, an anomalous change in the rate of decrease of Tc beyond Gd3+ is due to contributions from the single-ion anisotropy of the heavier rare-earth ions.