Colossal magnetoresistance in perovskite manganite induced by localized moment of rare earth ion

Dho, Joonghoe; Kim, W.S.; Chi, E.O.; Hur, Nam Hwi; Park, S.H.; Ri, H.-C.

doi:10.1016/s0038-1098(02)00775-5

Cited by 17 publications

(6 citation statements)

References 25 publications

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“…An interesting feature to be noted is that the irreversible field-induced FM phase is also discovered in other Pr-doped manganites such as Pr 0.7 Ca 0.3 MnO 3 , Pr 0.67 Ca 0.33 MnO 3 , and Pr 0.65 Ca 0.35 MnO 3 [14]. The T C of the field-induced FM phase monotonously decreases from 60 K to 25 K with decreasing the Pr concentration.…”

Section: Resultsmentioning

confidence: 75%

Thermal relaxation of field-induced irreversible ferromagnetic phase in Pr-doped manganites

Dho

Hur

2003

Phys. Rev. B

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We have investigated the magnetic and transport properties of Pr 0.65 Ca 0.35 MnO 3 and Pr 0.82 Na 0.18 MnO 3 with almost same doping level under various magnetic fields. Upon applying a field of 4 T, both compounds undergo a metamagnetic transition from antiferromagnetic (AFM) to ferromagnetic (FM) in the low temperature region. The field-induced FM state is very stable for at least 10 5 s even after removing the field. This irreversible FM behavior is different from the spontaneous FM ordering as well as the FM state in a reversible metamagnetic transition. We discuss this unusual FM phenomenon found in the Pr-doped manganites with the AFM ground state in terms of the reorientation of Mn spins pinned by localized Pr moments.

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Section: Resultsmentioning

confidence: 75%

Thermal relaxation of field-induced irreversible ferromagnetic phase in Pr-doped manganites

Dho

Hur

2003

Phys. Rev. B

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“…Perovskite-like materials are known for their various prominent properties, such as piezoelectricity, colossal magnetoresistance, multiferroicity, photoelectric activity, or superconductivity . Besides, their relatively simple structures derived from the primitive cubic prototype Pm m allow one to interpret and perform theoretical studies on the occurrence of those properties.…”

Section: Introductionmentioning

confidence: 99%

Phase Transitions in the Metastable Perovskite Multiferroics BiCrO₃ and BiCr_0.9Sc_0.1O₃: A Comparative Study

et al. 2020

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The temperature behavior of the crystal structure as well as dielectric and magnetic properties of the perovskite bismuth chromate ceramics with the 10 mol % Cr3+-to-Sc3+ substitution were studied and compared with those of the unmodified compound. Using a high-pressure synthesis, BiCrO3 and BiCr0.9Sc0.1O3 were obtained as metastable perovskite phases which are monoclinic C2/c with the √6a p × √2a p × √6a p superstructure (where a p is the primitive perovskite unit-cell parameter) under ambient conditions. At room temperature, the unit cell volume of BiCr0.9Sc0.1O3 is ∼1.3% larger than that of BiCrO3. Both perovskites undergo a reversible structural transition into a nonpolar GdFeO3-type phase (orthorhombic Pnma, √2a p × 2a p × √2a p) in the temperature ranges of 410–420 K (BiCrO3) and 470–520 K (BiCr0.9Sc0.1O3) with a relative jump of the primitive perovskite unit cell volume of about −1.6 and −2.0%, respectively. Temperature dependences of the complex dielectric permittivity demonstrate anomalies in the phase transition ranges. The Pnma-to-C2/c crossover in BiCrO3 is accompanied by a decrease in the direct current (dc) conductivity, while in BiCr0.9Sc0.1O3 the conductivity increases. The onset of an antiferromagnetic order in BiCr0.9Sc0.1O3 is observed at the Néel temperature (T N) of about 85 K as compared with T N = 110 K in BiCrO3. In contrast to BiCrO3, which exhibits a spin reorientation at T sr ∼ 72 K, no such a transition occurs in BiCr0.9Sc0.1O3.

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“…In particular, 60 K is the temperature below which ordering of Pr 3+ 4f moments has been reported, 10 and below which the magnetic-field-induced insulator to metal transition is irreversible. [38][39][40] The strong magnetization anisotropy that we observe in F_110 for the two orthogonal directions of H is, on the other hand, reminiscent of the anisotropic behavior which is typical of the Pr 3+ Van-Vleck paramagnetic susceptibility. 41,42 We propose therefore that the observed features in M͑T͒ between T C and 50 K may be connected to the Pr 3+ species and to a possible interaction between the rare-earth and the manganese sublattices, switched on just below the ferromagnetic Mn transition.…”

Section: B Magnetic Characterization Of F_110mentioning

confidence: 59%

Magnetic properties of pseudomorphic epitaxial films ofPr0.7Ca0.3MnO3under different biaxial tensile stresses

et al. 2010

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In order to analyze the effect of strain on the magnetic properties of narrow-band manganites, temperatureand field-dependent susceptibilities of about 8.5-nm-thick epitaxial Pr 0.7 Ca 0.3 MnO 3 films, respectively, grown on ͑001͒ and ͑110͒ SrTiO 3 substrates, have been compared. For ultrathin samples grown on ͑001͒ SrTiO 3 , a bulklike cluster-glass magnetic behavior is found, indicative of the possible coexistence of antiferromagnetic and ferromagnetic phases. On the contrary, ultrathin films grown on ͑110͒ substrates show a robust ferromagnetism with a strong spontaneous magnetization of about 3.4 B / Mn atom along the easy axis. On the base of high-resolution reciprocal space mapping analyses performed by x-ray diffraction, the different behaviors are discussed in terms of the crystallographic constraints imposed by the epitaxy of Pr 0.7 Ca 0.3 MnO 3 on SrTiO 3 . We suggest that for growth on ͑110͒ SrTiO 3 , the tensile strain on the film c axis, lying within the substrate plane, favors the ferromagnetic phase, possibly by allowing a mixed occupancy and hybridization of both in-plane and out-of-plane e g orbitals. Our data allow to shed some physics of inhomogeneous states in manganites and on the nature of their ferromagnetic insulating state.

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Colossal magnetoresistance in perovskite manganite induced by localized moment of rare earth ion

Cited by 17 publications

References 25 publications

Thermal relaxation of field-induced irreversible ferromagnetic phase in Pr-doped manganites

Thermal relaxation of field-induced irreversible ferromagnetic phase in Pr-doped manganites

Phase Transitions in the Metastable Perovskite Multiferroics BiCrO₃ and BiCr_0.9Sc_0.1O₃: A Comparative Study

Magnetic properties of pseudomorphic epitaxial films ofPr0.7Ca0.3MnO3under different biaxial tensile stresses

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Colossal magnetoresistance in perovskite manganite induced by localized moment of rare earth ion

Cited by 17 publications

References 25 publications

Thermal relaxation of field-induced irreversible ferromagnetic phase in Pr-doped manganites

Thermal relaxation of field-induced irreversible ferromagnetic phase in Pr-doped manganites

Phase Transitions in the Metastable Perovskite Multiferroics BiCrO3 and BiCr0.9Sc0.1O3: A Comparative Study

Magnetic properties of pseudomorphic epitaxial films ofPr0.7Ca0.3MnO3under different biaxial tensile stresses

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Phase Transitions in the Metastable Perovskite Multiferroics BiCrO₃ and BiCr_0.9Sc_0.1O₃: A Comparative Study