@article{Trukhanov_Troyanchuk_Korshunov_Sirenko_Szymczak_Baerner_2001, place={Харків, Україна}, title={Effect of oxygen content on magnetization and magnetoresistance properties of CMR manganites}, volume={27}, url={https://fnt.ilt.kharkov.ua/index.php/fnt/article/view/f27-0385e}, abstractNote={The influence of oxygen content on the magnetization and electrical resistivity of Ln0.5A0.5MnO3 (Ln=La,Pr,Nd; A=Ca,Ba) manganites with the perovskite structure is investigated. It is shown that the La0.5Ca0.5MnO3-g compound undergoes a sequence of transitions from an antiferromagnetic (g=0) to a spin-glass (g=0.17) state and then to an inhomogeneous ferromagnetic (g=0.3) state. A transition from an antiferromagnetic charge-ordered state to a ferromagnetic charge-disordered state in Nd0.5Ca0.5 MnO3-g is observed as the oxygen content is reduced to where g=0.07. The Nd0.5Ba0.5 MnO3-g compound shows an increase of the Curie point from 110 K (g=0) up to 310 K (g=0.3). In addition, a large magnetoresistance is revealed which develops below their Curie temperature despite the absence of Mn3+√Mn4+ pairs. A Zener double-exchange interaction is usually used in literature to explain the magnetic and electrical properties of hole-doped perovskite manganites. The data obtained support the mechanism of superexchange interactions between magnetic moments of the manganese ions via oxygen.}, number={4}, journal={ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР}, author={Trukhanov, S. V. and Troyanchuk, I. O. and Korshunov, F. P. and Sirenko, V. A. and Szymczak, H. and Baerner, K.}, year={2001}, month={Квіт}, pages={385–391} }