Journal ArticleDOI
Abrupt jumps in the metamagnetic transitions of orbitally ordered manganites
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In this article, the magnetic properties of the Pr0.5Ca0.97Ga0.03O3 perovskite manganite were investigated and it was shown that the low T orbitally and charge ordered state has been destabilized by the nonmagnetic impurity substituted for Mn.Abstract:
An experimental study of the magnetic properties of the Pr0.5Ca0.5Mn0.97Ga0.03O3 perovskite manganite is presented. The ac magnetic susceptibility measurements show that the low T orbitally and charge ordered state has been destabilized by the nonmagnetic impurity substituted for Mn. In this compound, at 2.5 K, well-defined, sharp steps on the field-dependent magnetization curves are observed. This unusual metamagnetic transition is found to be sensitive to thermal cycling. The latter induces a training effect for the transition, which strongly supports the proposed martensitic-like physics of some phase-separated manganites.read more
Citations
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The effect of Al substitution on charge ordered Pr0.5Ca0.5MnO3: structure, magnetism and transport
Sunil Nair,Alok Banerjee +1 more
TL;DR: In this paper, the effect of Mn site substitution of Al on the structural, magnetic and transport properties of charge ordered Pr0.5Ca 0.5MnO3 was investigated.
Journal ArticleDOI
Dilution of two-dimensional antiferromagnetism by Mn site substitution in La 1 Sr 2 Mn 2-x Al x O 7
Sunil Nair,Alok Banerjee +1 more
TL;DR: In this article, the effect of Al substitution on the Mn site of the bilayered half doped manganite was investigated and it was shown that the long-range antiferromagnetic transition temperature as a function of substitution matched well with established quasi-two-dimensional (quasi-2D) Heisenberg systems.
Journal ArticleDOI
Magnetization steps in a noncharge-ordered manganite, Pr0.5Ba0.5MnO3
TL;DR: In this paper, it was shown that the observed antiferromagnetic to ferromagnetic metamagnetic transition originates from cation-ordered PrBaMn2O6 nanoregions.
Journal ArticleDOI
Staircase-like metamagnetic transitions in phase-separated manganites: Influence of thermal and mechanical treatments
TL;DR: In this article, the influence of two treatments, high-temperature annealing and grinding, on the phenomenon of metamagnetic transition was investigated. But the results provided us with information about the origin of these jumps in magnetization.
Journal ArticleDOI
Instability of magnetism in Pr 0.5 Ca 0.5 Mn 1 − x Cr x O 3 ( x = 0.015 , 0.03 ) : Competition between pressure and thermal cycling effects
V. Markovich,I. M. Fita,I. M. Fita,Roman Puzniak,C. Martin,A. Wisniewski,C. Yaicle,Antoine Maignan,G. Gorodetsky +8 more
TL;DR: In this article, the effect of the suppression of the Jahn-Teller distortions and of the electron-phonon coupling in interfacial regions and in ferromagnetic domains under an applied hydrostatic pressure is discussed.
References
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Journal ArticleDOI
Percolative phase separation underlies colossal magnetoresistance in mixed-valent manganites
Masatomo Uehara,Masatomo Uehara,Shigeo Mori,Shigeo Mori,Shigeo Mori,Cheng-Hsuan Chen,Cheng-Hsuan Chen,Sang-Wook Cheong,Sang-Wook Cheong,Sang-Wook Cheong +9 more
TL;DR: In this article, it was shown that the magnetoresistive response increases dramatically when the Curie temperature (T C) is reduced, and that the massive magnetoresistance in low-T C systems can be explained by percolative transport through the ferromagnetic domains; this depends sensitively on the relative spin orientation of adjacent magnetoric domains which can be controlled by applied magnetic fields.
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Phase Separation Scenario for Manganese Oxides and Related Materials
TL;DR: Experimental data reviewed here by applying several techniques for manganites and other materials are consistent with a transition between the antiferromagnetic insulator state of the hole-undoped limit and the ferromagnetic metal at finite hole density through a mixed-phase process.
Journal ArticleDOI
Neutron diffraction study of Pr1 − xCaxMnO3 perovskites
TL;DR: In this paper, a powder neutron diffraction study of Pr 1 − x Ca x - Mn 3+ 1− x Mn 4+ x O 3 (0 x 3+ ions and their orbitals) was revealed.
Journal ArticleDOI
Paired and Unpaired Charge Stripes in the Ferromagnetic Phase of La 0.5 Ca 0.5 MnO 3
Journal ArticleDOI
High-magnetic-field study of the phase transitions of R 1 − x Ca x MnO 3 ( R = Pr , Nd)
TL;DR: In this paper, the authors investigated the magnetic-field-induced phase transitions of the charge carriers and found that the destruction of the real-space ordering is accompanied with a structural phase transition as well as with the magnetic phase transition and the colossal magnetoresistance effect.