Results 71 to 80 of about 960 (185)

Estudio Mössbauer para el sistema La_0.7M_0.3Mn_1-xFe_xO_3-y (M = Pb, Sr, 0.01 ≤ X ≤ 0.3)

Boletín de la Sociedad Española de Cerámica y Vidrio, 2000
On cooling the compounds of the form La1-xMxMnO3-y (where M is divalent cation) show a large decrease in resistivity associated with a paramagnetic to ferromagnetic transition.
Rojo, T., Plazaola, F., Hernández, T., Barandiarán, J. M.   +3 more
doaj  

Structural and electromagnetic characteristics of perovskites in La1–c–xSrc+xMn1–xMe4+xO3 systems (Me=Ge, Ti)

EPJ Web of Conferences, 2013
Experimental data are shown for the influence of substituting quadrivalent ions on the concentration phase transitions “rhombohedral-orthorhombic structure” and “semiconductor-metal” in ceramic manganites of specifically designed system La3+1–c–xSr2+c ...
Karpasyuk V., Estemirova S., Epifanova I., Datskaya Z., Badelin A., Smirnov A.   +5 more
doaj   +1 more source

Magnetorresistência colossal em La5/8-yPr yCa3/8MnO3 Magnetoresistance in La5/8-yPr yCa3/8MnO3

Cerâmica, 2007
Amostras policristalinas de La5/8-yPr yCa3/8MnO3, 0 0,35) revelam um efeito de magnetorresistência colossal amplificado devido à coexistência e competição das FMM e OCI cujas frações volumétricas podem ser alteradas via mudança da temperatura e ...
S. H. Masunaga, R. F. Jardim
doaj   +1 more source

Electric-pulse-induced resistance switching effect in the bulk of La0.5Ca0.5MnO3 ceramics

AIP Advances, 2014
In the majority of contributions, the electrical–pulse-induced resistance (EPIR) switching effect of perovskite manganites is thought to originate from the extrinsic interfacial Schottky barrier between the metal electrode and the surface of sample.
M. L. Wu, C. P. Yang, D. W. Shi, R. L. Wang, L. F. Xu, H. B. Xiao, K. Baerner   +6 more
doaj   +1 more source

Critical Behavior of La0.8Ca0.2Mn1−xCoxO3 Perovskite (0.1 ≤ x ≤ 0.3)

Magnetochemistry, 2017
The critical properties of La0.8Ca0.2Mn1−xCoxO3 (x = 0, 0.1, 0.2 and 0.3) compounds were investigated by analysis of the magnetic measurements in the vicinity of their critical temperature. Arrott plots revealed that the paramagnetic PM-ferromagnetic (FM)
Dorra Turki, Zafar Khan Ghouri, Saeed Al-Meer, Khaled Elsaid, M. I. Ahmad, Ahmed Easa, Gyorgy Remenyi, Sami Mahmood, El Kebir Hlil, Mohamed Ellouze, Foued Elhalouani   +10 more
doaj   +1 more source

Controllable magnetization and resistivity jumps of manganite thin films on BaTiO3 substrate

AIP Advances, 2015
Manganites thin films grown on ferroelectric BaTiO3 (BTO) exhibit dramatic jumps for both magnetization and resistivity upon cooling in accordance with the temperature-dependent structural transitions of the BTO substrate.
Wengang Wei, Jinjie Chen, Kai Zhang, Yunfang Kou, Kai Du, Yinyan Zhu, Wenbin Wang, Xiaolong Li, Xingmin Zhang, Xingyu Gao, Lei Zhang, Mingliang Tian, Denglu Hou, Lifeng Yin, Jian Shen   +14 more
doaj   +1 more source

Enhancement of temperature coefficient of resistance (TCR) and magnetoresistance (MR) of La0.67–xRExCa0.33MnO3 (x = 0, 0.1; RE = Gd, Nd, Sm) system via rare-earth substitution

Materials Research Express, 2020
We investigated the influence of 10% substitution of rare-earth (RE) elements on the crystallographic, transport, and magnetic properties of La _0.67– _x RE _x Ca _0.33 MnO _3 (RE = Nd, Sm, and Gd, x  = 0.0, 0.1) manganite perovskite compounds.
Anand Pal, B S Nagaraja, K J Rachana, K V Supriya, Dhananjaya Kekuda, Ashok Rao, Chia-Ruei Li, Yung-Kang Kuo   +7 more
doaj   +1 more source

Efectos intergranulares en perovskitas de manganeso nanocristalinas

Boletín de la Sociedad Española de Cerámica y Vidrio, 2000
Intergranular magnetotransport effects are studied on polycrystalline manganites. Reducing grain size through sol-gel technology allows us to show new results on these materials.
Hueso, L. E., Fondado, A., Rivas, J., Rivadulla, F., López-Quintela, M. A   +4 more
doaj  

Giant dielectric permittivity and magneto-capacitance effects in low doped manganites

New Journal of Physics, 2014
The effect of giant dielectric permittivity due to phase separation accompanied by charged inhomogeneities in low-doped manganites is discussed. The effect appears in the vicinity of the second-order magnetic phase transition and is caused by long-range ...
R F Mamin, V V Kabanov
doaj   +1 more source

Chemical and thermomechanical compatibility between neodymium manganites and electrolytes based on ceria

Boletín de la Sociedad Española de Cerámica y Vidrio, 2008
The goal of this work was to study the thermal expansion behaviour and to establish the phase relations between NdMe0.5Mn0.5O3 (Me=Ni, Co) solid solutions as cathodes and two electrolytes based on Ce0.9Gd0.1O1.95. Doping of electrolyte with 1.0 wt% Bi2O3
Gil, V., Tartaj, J., Moure, C.
doaj