Magnetism and charge ordering in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Pr</mml:mi></mml:mrow><mml:mrow><mml:mn>0.5</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ca</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Sr</mml:mi></mml:mrow><mml:mrow><mml:mn>0.5</mml:mn><mml:mi>

Jirák, Z.; Damay, F.; Hervieu, M.; Martin, C.; Raveau, B.; André, G.; Bourée, F.

doi:10.1103/physrevb.61.1181

Cited by 152 publications

(101 citation statements)

References 18 publications

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“…Note that the AO plane contains apical oxygens of MnO 6 octahedra. In the charge-and ) orbital-disordered phase of Pr 0.5 Ca 0.5 MnO 3 , MnO 6 octahedron is almost isotropic with slight compression along c-axis due to the pseudo cubic symmetry of the crystal structure 36 . Below the CO-OO transition, e g electrons tend to maximize the kinetic energy gain due to the local double exchange interaction with the neighboring Mn 4+ t 2g spins on the ab-plane, and the (3y 2 − r 2 )/(3x 2 − r 2 )-type orbital shape is favored.…”

Section: Discussionmentioning

confidence: 99%

“…The concomitant CO-OO is observed at T CO which is higher than the CE-type antiferromagnetic ordering in every case 33,37 . In Pr 0.5 Ca 0.5 MnO 3 and Eu 0.5 Ca 1.5 MnO 4 , the CO-OO transitions take place at T CO ∼230 K and 325 K, and the CE-type antiferromagnetic order with spins pointing along the b-axis is established at T N ∼170 K and 120 K, respectively 34,35,36,37 . The ferromagnetic zig-zag chain is parallel to the b-axis in Pr 0.5 Ca 0.5 MnO 3 , and to a-axis in Eu 0.5 Ca 1.5 MnO 4 , respectively.…”

Section: Introductionmentioning

confidence: 99%

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Lattice-form-dependent orbital shape and charge disproportionation in charge- and orbital-ordered manganites

et al. 2009

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The orbital shapes and charge disproportionations at nominal Mn 3+ and Mn 4+ sites for the chargeand orbital-ordered phases have been studied on half-doped manganites Pr(Sr0.1Ca0.9)2Mn2O7 and Eu0.5Ca1.5MnO4 with double-layer and single-layer Mn-O networks, respectively, by means of xray structural analyses, in comparison with Pr0.5Ca0.5MnO3 with the pseudo cubic network. In a single-layer Eu0.5Ca1.5MnO4 system, the (y 2 −z 2 )/(z 2 −x 2 )-type orbital shape is observed, while the (3y 2 −r 2 )/(3x 2 −r 2 )-type orbital shape in a pseudo cubic Pr0.5Ca0.5MnO3 system. In a double-layer Pr(Sr0.1Ca0.9)2Mn2O7 system, the orbital shape is found to undergo a large change upon thermally induced rotation of orbital stripe. Furthermore, clear charge disproportionation is observed for the pseudo cubic and double-layer systems, while not in the single-layer system. These results indicate that the orbital shape and charge disproportionation are sensitive to the dimension of Mn-O network.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lattice-form-dependent orbital shape and charge disproportionation in charge- and orbital-ordered manganites

et al. 2009

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“…The extracted parameters from Rietveld refinement on PCMO10 as well as the results obtained for bulk Pr 0.5 Ca 0.5 MnO 3 from neutron diffraction study are comparable with each other. 16 The crystallite size is calculated using Scherror's formula d = 0.9λ/Bcosθ , where d is the average particle size (nm), λ is the wavelength of the X-rays (1.54 Å), and B is the fullwidth at half maximum of the powder X-ray diffraction peaks; This gives a particle size of 10 nm. From transmission electron microscopy (TEM) image (cf.…”

Section: A Xrd and Tem Resultsmentioning

confidence: 99%

“…12 The high field magnetization (M-H) measurements were performed at various temperatures on tightly packed PCMO10 particles using the pulsed magnetic field facility at the University of Leuven. 16 We applied pulsed magnetic fields up to 300 kOe with pulse duration of about 20 ms by discharging a capacitor bank through a specially designed magnet coil. 17 For magnetization measurements we used the induction method by employing pickup coils, where the voltage induced in the pickup coils was integrated numerically to obtain the magnetization.…”

Section: Methodsmentioning

confidence: 99%

Martensite-like transition and spin-glass behavior in nanocrystalline Pr0.5Ca0.5MnO3

et al. 2011

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We report on isothermal pulsed (20 ms) field magnetization, temperature dependent AC – susceptibility, and the static low magnetic field measurements carried out on 10 nm sized Pr0.5Ca0.5MnO3 nanoparticles (PCMO10). The saturation field for the magnetization of PCMO10 (∼ 250 kOe) is found to be reduced in comparison with that of bulk PCMO (∼300 kOe). With increasing temperature, the critical magnetic field required to ‘melt’ the residual charge-ordered phase decays exponentially while the field transition range broadens, which is indicative of a Martensite-like transition. The AC - susceptibility data indicate the presence of a frequency-dependent freezing temperature, satisfying the conventional Vogel-Fulcher and power laws, pointing to the existence of a spin-glass-like disordered magnetic phase. The present results lead to a better understanding of manganite physics and might prove helpful for practical applications

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“…Since the orbital ordering, and hence the magnetic structures, is closely related to different types of cooperative JT vibration modes, [14] the apically compressed MnO 6 octahedra for the sample on STO imply a 3dx 2 −r 2 /3dy 2 −r 2 polarization of the e g orbitals, while the apically elongated octahedra for the sample on LAO imply a 3dz 2 −r 2 polarization of the e g orbitals [6,15]. So in the sample on STO and LAO the possible CO state is charge exchange (CE) type and C type respectively [16,17].…”

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confidence: 99%

Effect of strain on the electrical transport and magnetization of the epitaxialPr0.5Ca0.5MnO3∕La

Padhan

Prellier

2005

Phys. Rev. B

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on LAO shows thermally activated behavior, while the thermally activated behavior is suppressed and a metal-like transport is appearing for the samples on STO as the LCMO layer thickness increases above 10 unit cell. We have discussed these magnetic and transport properties of the trilayer structures on STO and LAO by the interfacial effect due to the stabilized CO state and the vibration mode of Jahn-Teller distortion.

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Magnetism and charge ordering inPr0.5CaxSr0.5

Cited by 152 publications

References 18 publications

Lattice-form-dependent orbital shape and charge disproportionation in charge- and orbital-ordered manganites

Lattice-form-dependent orbital shape and charge disproportionation in charge- and orbital-ordered manganites

Martensite-like transition and spin-glass behavior in nanocrystalline Pr0.5Ca0.5MnO3

Effect of strain on the electrical transport and magnetization of the epitaxialPr0.5Ca0.5MnO3∕La

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