“…The Ca 2-x Ln x MnO 4 compounds (Ln = Pr, Sm, Gd, Ho) are good examples of Ruddlesden-Popper manganites. These compounds display diverse magnetic and electronic phases such as antiferromagnetic (AFM)-insulating, ferromagnetic (FM)-conductor, paramagnetic (PM)-insulating [15], spin-glass [16][17][18][19][20][21][22][23][24][25][26] and charge-ordering [27]. On the other hand, these Ruddlesden-Popper manganites display interesting magnetic properties, depending on the materials-doping, multiple phase transitions, saturation and no-saturation magnetization.…”