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Jeong, I.-K.; Ahn, J. S.; Kim, B. G.; Yoon, Songhak; Singh, Satendra Pal; Pandey, Dhananjai

doi:10.1103/physrevb.83.064108

Cited by 21 publications

(7 citation statements)

References 26 publications

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“…Pure PFN crystallizes in monoclinic symmetry with Cm space group, which is in agreement with previous reports. 10,39,40 Substituting PFN with BFO leads to the formation of a pseudocubic (space group Pm% 3m) phase as previously reported in ref. 14, 16 and 22. In compositions with smaller amounts of BFO (x = 0.05 and 0.1), Rietveld analysis revealed the coexistence of monoclinic and pseudocubic phases, while in samples with higher BFO contents (0.2 r x r 0.5) only a pseudocubic phase is present ( Fig.…”

Section: Resultsmentioning

confidence: 57%

Strengthened relaxor behavior in (1−x)Pb(Fe_0.5Nb_0.5)O₃–xBiFeO₃

et al. 2020

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Section: Resultsmentioning

confidence: 57%

Strengthened relaxor behavior in (1−x)Pb(Fe_0.5Nb_0.5)O₃–xBiFeO₃

et al. 2020

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“…To explore both the SRO and LRO structures together, we decided to use the atomic PDF [90][91][92][93] technique using high-flux, high-energy, and high-Q synchrotron x-ray data, the details of which will be presented in this section. The PDF has information not only about the SR regime (within one unit cell or so) but also the medium range (limited to a few unit cells) and longrange (LR, above the medium range in real space) regimes [112,113].…”

Section: Temperature-dependent Atomic Pdf Analysismentioning

confidence: 99%

Pair distribution function study ofNi2MnGamagnetic shape memory alloy: Evidence for the precursor state of the premartensite phase

Singh

Pandey

2021

Phys. Rev. B

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Precursor phenomena preceding the martensite phase transition play a critical role in understanding the important technological properties of shape memory and magnetic shape memory alloys (MSMAs). Since the premartensite phase of Ni 2 MnGa MSMA, earlier considered as the precursor state of the martensite phase, has in recent years been shown to be a thermodynamically stable phase, Singh et al. [Nat. Commun. 8, 1006(2017], there is a need to revisit the precursor effects in these materials. We present here evidence for the existence of a precursor state of the premartensite phase in Ni 2 MnGa MSMA by atomic pair distribution function analysis of high-energy, high-flux, and high-Q synchrotron x-ray powder diffraction data. It is shown that the local structure of the cubic austenite phase corresponds to the short-range ordered (SRO) precursor state of the 3M premartensite phase at temperatures well above the actual premartensite phase transition temperature T PM and even above the ferromagnetic (FM) transition temperature T C . The presence of such a SRO precursor state of the premartensite phase is shown to lead to significant volume strain, which scales quadratically with spontaneous magnetization. The experimentally observed first-order character of the paramagnetic-to-FM phase transition and the anomalous reduction in the value of the magnetization in the temperature range T PM < T < T C are explained in terms of the coupling of the magnetoelastic strain with the FM order parameter and the higher magnetocrystalline anisotropy of the precursor state of the premartensite phase, respectively.

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“…Pb-based double perovskites with magnetic cations in the B-sites are potentially good candidates for both magnetic and ferroelectric orderings. Pb 2 FeNbO 6 and Pb 2 FeTaO 6 have been extensively studied since both exhibit ferroelectric order close to RT with polarization ( P s ) || ⟨111⟩ and anti-ferromagnetic (AFM) order below a Néel Temperature ( T N ) ≈ 150 K. , These materials frequently exhibit super-paramagnetic clusters even above RT, and due to the biquadratic magnetoelectric coupling (∼ M 2 P 2 ) the magnetic susceptibility exhibits anomalies at the ferroelectric phase transition temperature . This coupling can be very large and can even allow the switching of the ferroelectric domains by a magnetic field, as was recently demonstrated at RT in the solid solution between PbFe 1– x Ta x O 3 and PbZr 1– x Ti x O 3 .…”

Section: Introductionmentioning

confidence: 99%

Pb₂MnTeO₆ Double Perovskite: An Antipolar Anti-ferromagnet

Retuerto

Skiadopoulou

et al. 2016

Inorg. Chem.

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Pb2MnTeO6, a new double perovskite, was synthesized. Its crystal structure was determined by synchrotron X-ray and powder neutron diffraction. Pb2MnTeO6 is monoclinic (I2/m) at room temperature with a regular arrangement of all the cations in their polyhedra. However, when the temperature is lowered to ∼120 K it undergoes a phase transition from I2/m to C2/c structure. This transition is accompanied by a displacement of the Pb atoms from the center of their polyhedra due to the 6s(2) lone-pair electrons, together with a surprising off-centering of Mn(2+) (d(5)) magnetic cations. This strong first-order phase transition is also evidenced by specific heat, dielectric, Raman, and infrared spectroscopy measurements. The magnetic characterizations indicate an anti-ferromagnetic (AFM) order below TN ≈ 20 K; analysis of powder neutron diffraction data confirms the magnetic structure with propagation vector k = (0 1 0) and collinear AFM spins. The observed jump in dielectric permittivity near ∼150 K implies possible anti-ferroelectric behavior; however, the absence of switching suggests that Pb2MnTeO6 can only be antipolar. First-principle calculations confirmed that the crystal and magnetic structures determined are locally stable and that anti-ferroelectric switching is unlikely to be observed in Pb2MnTeO6.

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Short- and medium-range structure of multiferroic Pb(Fe1/2Nb1/2)O
I.-K. Jeong
¹
,
J. S. Ahn
²
,
B. G. Kim
³

et al.

Cited by 21 publications

References 26 publications

Strengthened relaxor behavior in (1−x)Pb(Fe_0.5Nb_0.5)O₃–xBiFeO₃

Strengthened relaxor behavior in (1−x)Pb(Fe_0.5Nb_0.5)O₃–xBiFeO₃

Pair distribution function study ofNi2MnGamagnetic shape memory alloy: Evidence for the precursor state of the premartensite phase

Pb₂MnTeO₆ Double Perovskite: An Antipolar Anti-ferromagnet

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Short- and medium-range structure of multiferroic Pb(Fe1/2Nb1/2)OI.-K. Jeong1, J. S. Ahn2, B. G. Kim3 et al.

Cited by 21 publications

References 26 publications

Strengthened relaxor behavior in (1−x)Pb(Fe0.5Nb0.5)O3–xBiFeO3

Strengthened relaxor behavior in (1−x)Pb(Fe0.5Nb0.5)O3–xBiFeO3

Pair distribution function study ofNi2MnGamagnetic shape memory alloy: Evidence for the precursor state of the premartensite phase

Pb2MnTeO6 Double Perovskite: An Antipolar Anti-ferromagnet

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Product

Resources

About

Short- and medium-range structure of multiferroic Pb(Fe1/2Nb1/2)O
I.-K. Jeong
¹
,
J. S. Ahn
²
,
B. G. Kim
³

et al.

Strengthened relaxor behavior in (1−x)Pb(Fe_0.5Nb_0.5)O₃–xBiFeO₃

Strengthened relaxor behavior in (1−x)Pb(Fe_0.5Nb_0.5)O₃–xBiFeO₃

Pb₂MnTeO₆ Double Perovskite: An Antipolar Anti-ferromagnet