Physical properties and crystal structure analysis of double-perovskite 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>NdBaMn</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:mrow></mml:math>
 by using single crystals

Yamada, Shigeki; Sagayama, Hajime; Higuchi, Koki; Sasaki, Toshiyuki; Sugimoto, Kunihisa; Arima, T.

doi:10.1103/physrevb.95.035101

Cited by 29 publications

(29 citation statements)

References 34 publications

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“…The intersite mixing between Nd and Ba in a single crystal with T M I of 290 K in the warming run is estimated the to be 1.2 % by using single crystal structure analysis by means of the synchrotron x-ray diffraction measurements. 29 In the present study, T M I is higher than 290 K, suggesting a highly ordered A-site cations. Although the metal-insulator transition is accompanied with a large hysteresis for temperature and a magnetic field dependence due to the first-order nature of the transition, the resistivity changes for temperature and a magnetic field sweeping are very steep.…”

supporting

confidence: 41%

“…The crystal contains ab twin structure as mentioned in our previous paper. 29 Only the fundamental reflections of the √ 2a p × √ 2a p × c p unit cell are observed above T M I as shown in Fig. 1(c).…”

mentioning

confidence: 93%

“…20,22,24 We recently succeeded in single-crystal growth of NdBaMn 2 O 6 and proposed that a first-order metal-insulator phase transition should not be accompanied by any magnetic ordering. 29 The resistivity change upon the metal-insulator transition is still larger than two orders of magnitude. The metal-insulator transition temperature T M I is decreased by applying a magnetic field.…”

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confidence: 99%

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Room-Temperature Low-Field Colossal Magnetoresistance in Double-Perovskite Manganite

et al. 2019

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The gigantic decrease of resistance by an applied magnetic field, which is often referred to as colossal magnetoresistance (CMR) 1-9 , has been an attracting phenomenon in strongly correlated electron systems. The discovery of CMR in manganese oxide compounds has developed the science of strong coupling among charge, orbital, and spin degrees of freedom. CMR is also attracting scientists from the viewpoint of possible applications to sensors, memories, and so on. However, no application using CMR effect has been achieved so far, partly because the CMR materials which satisfy all of the required conditions for the application, namely, high operating temperature, low operating magnetic field, and sharp resistive change, have not been discovered. Here we report a resistance change of more than two-orders of magnitude at a magnetic field lower than 2 T near 300 K in an A-site ordered NdBaMn 2 O 6 crystal. When temperature and a magnetic field sweep from insulating (metallic) phase to metallic (insulating) phase, the insulating (metallic) conduction changes to the metallic (insulating) conduction within 1 K and 0.5 T, respectively. The CMR is ascribed to the melting of the charge ordering. The entropy change which is estimated from the B-T phase diagram is smaller than what is expected for the charge and orbital ordering.The suppression of the entropy change is attributable to the loss of the short range ferromagnetic fluctuation of Mn spin moments, which an important key of the high temperature and low magnetic field CMR effect. arXiv:1811.07596v1 [cond-mat.str-el]

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confidence: 41%

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confidence: 93%

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confidence: 99%

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Room-Temperature Low-Field Colossal Magnetoresistance in Double-Perovskite Manganite

et al. 2019

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“…This structural transition coupled with the orbital-order transition result in a three-order change in the resistivity of the metal–insulator transition at 290 K. The octahedral tilt increases up to 10° with cooling, which modifies the structure to include the orthorhombic space group P2 1 am . The direction of the octahedral tilt at low temperatures is 45° from that at 300 K 26 . Temperature-dependent magnetic susceptibility measurements revealed that the material became antiferromagnetic below T N = 235 K. The crystal structures and phase transitions are summarized in Fig.…”

Section: Introductionmentioning

confidence: 84%

“…A detailed understanding of the structural, magnetic, and transport properties of NdBaMn 2 O 6 can be obtained by analyzing isotropic single-crystal 26,27 and polycrystalline samples. At room temperature, single-crystal NdBaMn 2 O 6 has an orthorhombic structure with a Cmmm space group, and the MnO 6 octahedral exhibits no tilting.…”

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confidence: 99%

Optical Study of the Electronic Structure and Lattice Dynamics of NdBaMn2O6 Single Crystals

Mero

Ogawa

Yamada

et al. 2019

Sci Rep

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We investigated the electronic structure and lattice dynamics of double perovskite NdBaMn2O6 single crystals through spectroscopic ellipsometry and Raman scattering spectroscopy. The optical absorption band centered at approximately 0.88 eV was assigned to on-site d–d transitions in Mn, whereas the optical feature at approximately 4.10 eV was assigned to charge-transfer transitions between the 2p state of O and 3d state of Mn. Analysis of the temperature dependence of the d-d transition indicated anomalies at 290 and 235 K. The activated phonon mode, which appeared at approximately 440 cm−1 alongside with the enhancement of the 270 cm−1 phonon mode, coupled strongly to the metal–insulator transition at 290 K, which was associated with a charge/orbital ordering. Moreover, the MnO6 octahedral breathing mode at 610 cm−1 exhibited softening at a temperature lower than 235 K (temperature of the antiferromagnetic phase transition), which revealed the strong coupling between the lattice and magnetic degrees of freedom. The spin–phonon coupling constant obtained was λ = 2.5 cm−1. These findings highlight the importance of charge–orbital–spin interactions in establishing NdBaMn2O6 phases with novel properties.

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Evolution of crystal structure and redox activity of LnBaMn2O6−δ upon various external conditions: in-situ characterization

Shalamova,

Samigullina,

Chukin

et al. 2023

J Mater Sci

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Physical properties and crystal structure analysis of double-perovskite NdBaMn2O6 by using single crystals

Cited by 29 publications

References 34 publications

Room-Temperature Low-Field Colossal Magnetoresistance in Double-Perovskite Manganite

Room-Temperature Low-Field Colossal Magnetoresistance in Double-Perovskite Manganite

Optical Study of the Electronic Structure and Lattice Dynamics of NdBaMn2O6 Single Crystals

Evolution of crystal structure and redox activity of LnBaMn2O6−δ upon various external conditions: in-situ characterization

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