Study of A-site ordered PrBaMn<sub>2</sub>O<sub>6−δ</sub>manganite properties depending on the treatment conditions

Труханов, С. В.; Lobanovski, L. S.; Bushinsky, M. V.; Федотова, В. В.; Troyanchuk, I. O.; Труханов, А.В.; Ryzhov, V. A.; Szymczak, H.; Szymczak, R.; Баран, М.

doi:10.1088/0953-8984/17/41/019

Cited by 79 publications

(31 citation statements)

References 44 publications

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“…In general, the spatial locations of the chemical dopants are random, which generates a certain kind of disorder in the system. For CMR mangnanites, it has been shown that the ordering of chemical dopants, or the cation ordering has strong influence on the physical properties for both bulk11121314151617 and superlattice structures181920212223242526. However, very few work has dealt the correlation between cation ordering and the electronic phase separation (EPS)27, despite of the fact that EPS is important for both understanding the mechanism of strong electronic correlation and for tuning the physical properties.…”

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confidence: 99%

Chemical ordering suppresses large-scale electronic phase separation in doped manganites

Zhu

Niu

et al. 2016

Nat Commun

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For strongly correlated oxides, it has been a long-standing issue regarding the role of the chemical ordering of the dopants on the physical properties. Here, using unit cell by unit cell superlattice growth technique, we determine the role of chemical ordering of the Pr dopant in a colossal magnetoresistant (La1−yPry)1−xCaxMnO3 (LPCMO) system, which has been well known for its large length-scale electronic phase separation phenomena. Our experimental results show that the chemical ordering of Pr leads to marked reduction of the length scale of electronic phase separations. Moreover, compared with the conventional Pr-disordered LPCMO system, the Pr-ordered LPCMO system has a metal–insulator transition that is ∼100 K higher because the ferromagnetic metallic phase is more dominant at all temperatures below the Curie temperature.

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confidence: 99%

Chemical ordering suppresses large-scale electronic phase separation in doped manganites

Zhu

Niu

et al. 2016

Nat Commun

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“…Such spread of the critical temperatures follows from a substantial dependence of the physical properties of these materials on synthesis conditions [6,7]. The ceramic sample PrBaMn 2 O 6 was prepared by chemical homogenization method.…”

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confidence: 99%

Direct and inverse magnetocaloric effects in A-site ordered PrBaMn2O6 manganite

Aliev

Gamzatov

Batdalov

et al. 2011

Journal of Alloys and Compounds

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The magnetocaloric effect (MCE) of A-site ordered PrBaMn 2 O 6 manganite has been studied by direct methods and by the specific heat measurements. Direct measurements of the MCE in low magnetic fields were performed using recently proposed modulation technique and by classic direct method in high fields. Direct and inverse MCE are observed at Curie and Neel points correspondingly. A value of the inverse MCE in the heating run is less than in the cooling regime.This effect can be attributing to competition between ferromagnetic and antiferromagnetic interactions. Indirectly estimated and direct MCE values considerably differ in around first order AF transition.Recently, half-doped manganite perovskites with the A-site order RBaMn 2 O 6 have been attracting of interest due to their novel physical properties [1][2][3][4]. RBaMn 2 O 6 displays remarkable features: the charge/orbital order (CO) transition at relatively high temperatures, a new stacking variation of the CE-type CO with a fourfold periodicity along the c-axis, the presence of structural transition and electronic phase segregation and these features strongly depend on an ordering degree of R and Ba cations [5]. But a nature of appearance of the cation-ordered state in Ba-substituted manganites is not understood entirely so far.The ground state of PrBaMn 2 O 6 is a coexistence of ferromagnetic metal (with T C =310-320 K) and A-type antiferromagnetic metal (with T N =200-270 K) [5]. Such spread of the critical temperatures follows from a substantial dependence of the physical properties of these materials on synthesis conditions [6,7].

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“…It is worth mentioning that the distortion of MnO 6 octahedra is different between A-site ordered and disordered PBMO 34 . In addition, the A-site ordered PBMO occurs a ferromagnetic-paramagnetic transition at about 320 K, while A-site disordered PBMO has T C ≈ 140 K 25 .…”

Section: Resultsmentioning

confidence: 98%

“…For CeO 2 embedded in PBMO matrix with the OR-II, the CeO 2 nanopillars have few CeO 2 unit cells in width. Compared with the A-site disordered PBMO, the A-site ordered PBMO at the PBMO/CeO 2 interface leads to the reduction of lattice parameter (1.8%) 25 , which can partially release the epitaxial strain of the VAN (PBMO) 0.8 :(CeO 2 ) 0.2 film 35 . Additionally, semi-coherent PBMO/CeO 2 interface with interfacial dislocations appears along the in-plane direction, as demonstrated in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…A horizontal white arrow denotes the film-substrate interface. It is found that the coherent growth of PBMO film on LSAT substrate occurs, and the relatively small lattice mismatch (0.7%) between PBMO (a PBMO = 0.3895 nm 25 ) and LSAT (a LSAT = 0.3868 nm 26 ) is accommodated by the lattice elastic energy. In addition, the CeO 2 nanopillar epitaxially grows directly on the LSAT substrate with (001)[110] CeO2 //(001) [100] LSAT , which may be due to the small lattice mismatch (−1.1%) calculated by Δf = a a a , where a CeO2 and a LSAT are the lattice parameter of CeO 2 (a CeO2 = 0.5411 nm 27 ) and LSAT, respectively.…”

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Self-assembling behavior and interface structure in vertically aligned nanocomposite (Pr0.5Ba0.5MnO3)1-x:(CeO2)x films on (001) (La,Sr)(Al,Ta)O3 substrates

Cheng

Shen

et al. 2020

Sci Rep

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Heteroepitaxial oxide-based nanocomposite films possessing a variety of functional properties have attracted tremendous research interest. Here, self-assembled vertically aligned nanocomposite (Pr0.5Ba0.5MnO3)1-x:(CeO2)x (x = 0.2 and 0.5) films have been successfully grown on single-crystalline (001) (La,Sr)(Al,Ta)O3 substrates by the pulsed laser deposition technique. Self-assembling behavior of the nanocomposite films and atomic-scale interface structure between Pr0.5Ba0.5MnO3 matrix and CeO2 nanopillars have been investigated by advanced electron microscopy techniques. Two different orientation relationships, (001)[100]Pr0.5Ba0.5MnO3//(001)[1-10]CeO2 and (001)[100]Pr0.5Ba0.5MnO3//(110)[1-10]CeO2, form between Pr0.5Ba0.5MnO3 and CeO2 in the (Pr0.5Ba0.5MnO3)0.8:(CeO2)0.2 film along the film growth direction, which is essentially different from vertically aligned nanocomposite (Pr0.5Ba0.5MnO3)0.5:(CeO2)0.5 films having only (001)[100]Pr0.5Ba0.5MnO3//(001)[1-10]CeO2 orientation relationship. Both coherent and semi-coherent Pr0.5Ba0.5MnO3/CeO2 interface appear in the films. In contrast to semi-coherent interface with regular distribution of interfacial dislocations, interface reconstruction occurs at the coherent Pr0.5Ba0.5MnO3/CeO2 interface. Our findings indicate that epitaxial strain imposed by the concentration of CeO2 in the nanocomposite films affects the self-assembling behavior of the vertically aligned nanocomposite (Pr0.5Ba0.5MnO3)1-x:(CeO2)x films.

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Study of A-site ordered PrBaMn₂O_6−δmanganite properties depending on the treatment conditions

Cited by 79 publications

References 44 publications

Chemical ordering suppresses large-scale electronic phase separation in doped manganites

Chemical ordering suppresses large-scale electronic phase separation in doped manganites

Direct and inverse magnetocaloric effects in A-site ordered PrBaMn2O6 manganite

Self-assembling behavior and interface structure in vertically aligned nanocomposite (Pr0.5Ba0.5MnO3)1-x:(CeO2)x films on (001) (La,Sr)(Al,Ta)O3 substrates

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Study of A-site ordered PrBaMn2O6−δmanganite properties depending on the treatment conditions

Cited by 79 publications

References 44 publications

Chemical ordering suppresses large-scale electronic phase separation in doped manganites

Chemical ordering suppresses large-scale electronic phase separation in doped manganites

Direct and inverse magnetocaloric effects in A-site ordered PrBaMn2O6 manganite

Self-assembling behavior and interface structure in vertically aligned nanocomposite (Pr0.5Ba0.5MnO3)1-x:(CeO2)x films on (001) (La,Sr)(Al,Ta)O3 substrates

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Study of A-site ordered PrBaMn₂O_6−δmanganite properties depending on the treatment conditions