Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Parisi, F."'
Autor:
Eslava, G. G., Parisi, F., Bernardo, P. L., Quintero, M., Leyva, G., Cohen, L. F., Ghivelder, L.
Publikováno v:
Physics Letters A v. 380 (38), 3107-3110, 2016
We investigate a series of manganese oxides, the La0.225Pr0.4(Ca1-xSrx)0.375MnO3 system. The x = 0 sample is a prototype compound for the study of phase separation in manganites, where ferromagnetic and charge ordered antiferromagnetic phases coexist
Externí odkaz:
http://arxiv.org/abs/1602.08597
We investigate the behavior of ultrasharp metamagnetic transitions in La(5/8-y)Nd(y)Ca(3/8)MnO(3) manganites. These compounds change from a low temperature ferromagnetic metallic state at low Nd doping to a charge-ordered antiferromagnetic insulator
Externí odkaz:
http://arxiv.org/abs/1602.08594
Publikováno v:
Appl. Phys. Lett. 97, 121916 (2010)
We present a study of the magnetocaloric effect in La5/8-yPryCa3/8MnO3 (y=0.3) and Pr0.5Ca0.09Sr0.41MnO3 manganites. The low temperature state of both ystems is the result of a competition between the antiferromagnetic and ferromagnetic phases. The s
Externí odkaz:
http://arxiv.org/abs/1009.2914
We present magnetic and transport measurements on La5/8-yPryCa3/8MnO3 with y = 0.3, a manganite compound exhibiting intrinsic multiphase coexistence of sub-micrometric ferromagnetic and antiferromagnetic charge ordered regions. Time relaxation effect
Externí odkaz:
http://arxiv.org/abs/0807.2631
Publikováno v:
Phys. Rev. B 73, 014403 (2006).
We present a phenomenological model based on the thermodynamics of the phase separated state of manganites, accounting for its static and dynamic properties. Through calorimetric measurements on La$_{0.225}$Pr$_{0.40}$Ca$ _{0.375}$MnO$_{3}$ the low t
Externí odkaz:
http://arxiv.org/abs/cond-mat/0511523
Autor:
Ghivelder, L., Parisi, F.
Detailed magnetization measurements in La_{5/8-y}Pr_{y}Ca_{3/8} MnO_{3}, including magnetic relaxation properties, demonstrate the dynamic nature of the phase separated state in manganites. The difference between the field-cooled-cooling and zero-fie
Externí odkaz:
http://arxiv.org/abs/cond-mat/0503406
Publikováno v:
Physica B 354/1-4, pp. 43-46 (2004)
We have studied a non volatile memory effect in the mixed valent compound La$_{0.5}$Ca$_{0.5}$MnO$_{3}$ induced by magnetic field (H). In a previous work [R.S. Freitas et al., Phys. Rev. B 65 (2002) 104403], it has been shown that the response of thi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412499
Autor:
Levy, P., Parisi, F., Quintero, M., Granja, L., Curiale, J., Sacanell, J., Leyva, G., Polla, G., Freitas, R. S., Ghivelder, L.
Publikováno v:
Phys Rev. B 65, 140401(R) (2002)
We have measured magnetic and transport response on the polycrystalline La$_{5/8-y}$Pr$_y$Ca$_{3/8}$MnO$_3$ ($y=0.30$, average grain size 2 microns) compound. In the temperature range where ferromagnetic metallic and insulating regions coexist we obs
Externí odkaz:
http://arxiv.org/abs/cond-mat/0202261
Publikováno v:
Phys. Rev. Lett. 137001 (2002)
The time dependent response of the magnetic and transport properties of Fe-doped phase separated (PS) manganite La$_{0.5}$Ca$_{0.5}$MnO$_{3}$ is reported. The nontrivial coexistence of ferromagnetic (FM) and non FM regions induces a slow dynamics whi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0202263
Publikováno v:
Phys. Rev. B 65, 104403 (2002)
We present magnetization studies in a series of phase separated La$_{0.5}$Ca$%_{0.5}$MnO$_{3}$ samples, with different low temperature fractions of the ferromagnetic (FM) and charge ordered-antiferromagnetic (CO-AFM) phases. A particular experimental
Externí odkaz:
http://arxiv.org/abs/cond-mat/0109367