Hole-concentration-induced transformation of the magnetic and orbital structures in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Nd</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi>−</mml:mi><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:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml

Kajimoto, Ryoichi; Yoshizawa, H.; Kawano, H.; Kuwahara, H.; Tokura, Y.; Ohoyama, Kenji; Ohashi, Masayoshi

doi:10.1103/physrevb.60.9506

Cited by 364 publications

(268 citation statements)

References 37 publications

Supporting

Mentioning

229

Contrasting

Order By: Relevance

“…A fundamental advantage of the present work with respect to the preceding experiments is that we have studied a Nd 0. 5 31 we propose that this reflection has its origin on the d asymmetry of the even-Mn sublattice.…”

Section: Introductionmentioning

confidence: 83%

Double stripe ordering inNd0.5Sr0.5MnO3determined by resonant soft x-ray scattering

et al. 2006

View full text Add to dashboard Cite

We have studied the low-temperature ordered phase of Nd 0.5 Sr 0.5 MnO 3 by resonant soft x-ray scattering at the Mn L 2,3 edges. Strong resonances were observed at ͑ 0 1 2 0 ͒ and ͑ 1 2 0 0 ͒ reflections, which are resolved in momentum space. Azimuthal scans reveal a periodicity for both resonances, the minimum intensity being almost zero. The two reflections show a very different energy dependence which extends in the whole energy region of the Mn L-edge. The ͑ 0 1 2 0 ͒ reflection originates from the anisotropy induced on the d-symmetry projected density of states owing to the local tetragonal distortion at one of the two crystallographic inequivalent Mn sites ͑the so-called Mn 3+ ions in the conventional ionic description͒. This is similar to the resonance observed at the Mn K edge. We propose that the ͑ 1 2 0 0 ͒ reflection, which has not its counterpart either on the Mn K-edge resonant scattering or on the magnetic scattering, is originated by anisotropy of the d-symmetry projected density of the so-called Mn 4+ sublattice. In this way, the latter reflection could denote a pure orbital ordering in this sublattice.

show abstract

Section: Introductionmentioning

confidence: 83%

Double stripe ordering inNd0.5Sr0.5MnO3determined by resonant soft x-ray scattering

et al. 2006

View full text Add to dashboard Cite

show abstract

“…One of the most intriguing members of this family of materials is Nd 0.5 Sr 0.5 MnO 3 . A number of fascinating phenomena have been recently discovered and studied in Nd 0.5 Sr 0.5 MnO 3 (see, for example [2][3][4]), that made this compound extremely attractive from the point of view of testing recent theoretical predictions, including those involving charge and orbital effects.…”

mentioning

confidence: 99%

“…At a temperature of about 250 K (T C ) it becomes a ferromagnetically (FM) ordered metal. At yet lower temperatures of about 160 K the sample undergoes a transition into a charge-ordered (CO) insulating state [4], characterized by the co-existence of A-type antiferromagnetic (AF-A) and CE-type antiferromagnetic (AF-CE) phases [3,6]. The existence of the AF-A phase in samples with nominal composition Nd 0.5 Sr 0.5 MnO 3 can be attributed to a slight excess of Mn 4+ [7], that indicates an extremely delicate competition between FM, AF-CE and AF-A states in Nd 0.5 Sr 0.5 MnO 3 with x~0.5.…”

mentioning

confidence: 99%

“…The existence of the AF-A phase in samples with nominal composition Nd 0.5 Sr 0.5 MnO 3 can be attributed to a slight excess of Mn 4+ [7], that indicates an extremely delicate competition between FM, AF-CE and AF-A states in Nd 0.5 Sr 0.5 MnO 3 with x~0.5. The development of the AF-A phase starts at a temperature, higher than the temperature of the transition into the AF-CE phase [3,6]. The key feature of the AF-CE phase is the alternate ordering of the Mn 3+ and Mn 4+ ions into a CO state, which is accompanied by the (3z 2 -r 2 )-orbital ordering (OO) [2].…”

mentioning

confidence: 99%

“…The 2D orbital fluctuations result in the orbital liquid behavior of the FM phase, suppressing the Drude peak, and, thus, causing a pronounced increase in the microwave transmission at T > T CO . The decrease in the microwave transmission in the temperature range of ~ 170K -210 K reflects the corresponding weakening of the AF-A correlations [3,6], which makes the sample more "metallic" and less transparent to the microwaves. At temperatures above T ~ 220 K thermal fluctuations start to suppress the FM states, increasing the PM contribution and making the sample most transparent at T > T C .…”

mentioning

confidence: 99%

See 2 more Smart Citations

Microwave properties of Nd0.5Sr0.5MnO3: a key role of the (x2−y2)-orbital effects

Zvyagin¹,

Angerhofer²,

Kamenev³

et al. 2002

Solid State Communications

View full text Add to dashboard Cite

Transmittance of the colossal magnetoresistive compound Nd 0.5 Sr 0.5 MnO 3 showing metal-insulator phase transition has been studied by means of the submm-and mmwavelength band spectroscopy. An unusually high transparency of the material provided direct evidence for the significant suppression of the coherent Drude weight in the ferromagnetic metallic state. Melting of the A-type antiferromagnetic states has been found to be responsible for a considerable increase in the microwave transmission, which was observed at the transition from the insulating to the metallic phase induced by magnetic field or temperature. This investigation confirmed a dominant role of the ( Optical reflectivity studies play a central role in the determination of the electronic and orbital states of r are-earth manganese oxides. Far-infrared (FIR) spectroscopy plays an especial role, providing important information about low-energy optical properties and characteristics of the manganites, including the Drude-weight contribution and, thus, the metallicity of these materials. Unfortunately, reflectivity spectra are very sensitive to the quality of the sample surface, that eventually may cause

show abstract

Magnetic Structure and Electronic Study of Complex Oxygen‐Deficient Manganites

Cortés‐Gil

Hernando

Ruiz‐González

et al. 2008

Chemistry A European J

View full text Add to dashboard Cite

Neutron diffraction and X-ray absorption near-edge structure (XANES) studies have been performed in La0.5Ca0.5MnO2.5, La0.5Sr0.5MnO2.5 and Nd0.5Sr0.5MnO2.5 oxygen-deficient perovskite compounds obtained by topotactic reduction. They all exhibit a brownmillerite structure with G-type antiferromagnetic ordering. Mn2+, Mn3+ and Mn4+ coexist at the octahedral sites, whereas only Mn2+ is placed in the tetrahedral positions. A magnetic moment of 1.6 microB has been detected at the tetrahedral layers, which can be explained by assuming Mn2+ is in a low-spin configuration.

show abstract

Hole-concentration-induced transformation of the magnetic and orbital structures inNd1−xSrx

Cited by 364 publications

References 37 publications

Double stripe ordering inNd0.5Sr0.5MnO3determined by resonant soft x-ray scattering

Double stripe ordering inNd0.5Sr0.5MnO3determined by resonant soft x-ray scattering

Microwave properties of Nd0.5Sr0.5MnO3: a key role of the (x2−y2)-orbital effects

Magnetic Structure and Electronic Study of Complex Oxygen‐Deficient Manganites

Contact Info

Product

Resources

About