Transport and thermal properties of La0.67Ca0.33Mn1−xMxO3 (M=Fe, Zr and Hf)

Structure, transport and magnetism of La0.67Ca0.33Mn1−xTaxO3

“…In particular, no anomaly is detected near T c , indicating a non-metallic nature of the ferromagnetic phase. It is noteworthy that both the T MI and T c reduction with increasing x are the largest reported for Mn site substituted La 0.67 Ca 0.33 MnO 3 [1][2][3][4][5][8][9][10]. While T MI decreases at a constant rate of $36 K/at%, a linear decrease of similar rate ($39 K/ at%) is observed for T c up to x ¼ 0:03; which levels off to a much smaller rate (10 K/at%) for higher Ta Fig.…”

“…The decrease in transition temperature is generally attributed to the weakening of double-exchange (DE) interaction strength. In our previous studies on Mn site substitutions with both diamagnetic and paramagnetic ions [8][9][10], we rationalized the variation of extent of suppression in the transition temperature with concentration (dT c /dx) in terms of local structural modification due to size mismatch and local magnetic coupling between the magnetic moments of substituents and Mn ion. In this paper, we address the role of yet another important parameter, the valence state of the substituent in modifying the ground state properties.…”

Effect of exceeding the concentration limit of solubility of silver in perovskites on the dielectric and electric properties of half doped lanthanum–calcium manganite

“…The parent compound LaMnO 3 is doped by divalent alkaline earths (Ca, Sr, Ba, …). Several studies have been conducted in doping the Mn sites [11][12][13][14][15][16][17][18][19] which are the heart of the double exchange mechanism. To date, much of the physical characterization of these materials has been done through doping the La sites by only one kind of the dopant element.…”

Transport properties of silver–calcium doped lanthanum manganite

“…They can be used as magnetoresistive transducers, magnetic sensors, computer memory systems, magnetic refrigerants and infrared detectors [1][2][3]. These properties can be improved by choosing dopants [4][5][6][7][8][9][10][11][12], substitution sites [13], preparation route [14][15][16] and insertion of nanostructures [17].…”