Valence states of transition-metal ions in cubic perovskites SrMn1−xFexO3

Lee, Hongjoo J.; Kim, G.; Kang, J.-S.; Dąbrowski, B.; Han, Sang Wook; Lee, S. S.; Hwang, Chanyong; Jung, Min-Cherl; Shin, Hyun‐Joon; Lee, H. G.; Kim, J.-Y.; Min, B. I.

doi:10.1063/1.2713206

Cited by 8 publications

(2 citation statements)

References 14 publications

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“…The Mn L 3 -edge corresponds to a dipole-allowed transition of a 2p electron into unoccupied 3d states with a 2p 3/2 final state. The Mn L 3 -edge XANES spectra of mixed-valent Mn 3+ /Mn 4+ species typically has features that corresponds to both oxidation states [14,[21][22][23].…”

Section: Xanes Analysismentioning

confidence: 99%

Structural and magnetic studies of the electron doped manganites Sr_0.65Pr_0.35−xCe_xMnO₃(0.00 ≤x≤ 0.35)

Heyraud¹,

Blanchard²,

Liu³

et al. 2013

J. Phys.: Condens. Matter

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The nuclear and magnetic structures and properties of Sr0.65Pr0.35-xCexMnO3 (0.00 ≤ x ≤ 0.35) were investigated using a combination of synchrotron x-ray and neutron powder diffraction, along with magnetic and x-ray absorption near edge structure measurements. At room temperature, doping with Ce results in a transition from a tetragonal structure in I4/mcm to an orthorhombic one in Imma associated with the loss of long range orbital ordering. At low temperatures, we observe the formation of an orthorhombic Fmmm phase. XANES measurements demonstrate that the Ce exists as a mixture of Ce(3+) and Ce(4+).

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Section: Xanes Analysismentioning

confidence: 99%

Structural and magnetic studies of the electron doped manganites Sr_0.65Pr_0.35−xCe_xMnO₃(0.00 ≤x≤ 0.35)

Heyraud¹,

Blanchard²,

Liu³

et al. 2013

J. Phys.: Condens. Matter

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“…The spectral shape for the unpoled and poled samples of x = 0.1-0.3 and the unpoled sample of x = 0.4 is comparable to that of Fe 3+ perovskites, 20 whilst the observed high-energy shift/broadening on the poled samples of x = 0.4 indicates a possible increase in the valence states of iron, such as Fe 4+ . 21 This indicates that the Fe oxidation state may be changed by the poling treatment particularly on the x = 0.4 sample.…”

mentioning

confidence: 97%

Investigation of continuous changes in the electric-field-induced electronic state in Bi_1−xCa_xFeO_3−δ

Ikeda‐Ohno

Lim

Ohkochi

et al. 2014

Phys. Chem. Chem. Phys.

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Amongst the most interesting phenomena in correlated oxide systems are the doping-driven competitions between energetically similar ground states found in, e.g., high-Tc superconductors and colossal magnetoresistance manganites. It has recently been reported that doped multiferroics also exhibit this generic concept of phase competition. Here, we employ photoelectron emission microscopy (PEEM) to demonstrate evidence of systematic changes in the electronic structure of Bi(1-x)Ca(x)FeO(3-δ) treated by electrically controlled hole carrier doping, the outcome of which clearly correlates with the local modulation of electronic conductivity observed in the same material.

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Interface‐Coupled BiFeO₃/BiMnO₃ Superlattices with Magnetic Transition Temperature up to 410 K

Choi

Kleibeuker

Fix

et al. 2016

Adv Materials Inter

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polarization is very small (0.1 µ C cm −2 at ≈90 K) or it is even paraelectric. [ 4 ] In BFO, strong FE behavior (Ferroelectric transition temperature, T C,FE ≈ 1103 K) coexists together with antiferromagnetism (AFM). BFO has an incommensurate cycloidally modulated G-type AFM structure with a large period of 62 nm (Néel temperature, T N ≈ 650 K). [ 5,6 ] Despite having ferroelectric and magnetic ordering at high temperatures, BFO has drawbacks for practical applications. Most notably the weak FM-like magnetic behavior results from destruction of its incommensurate magnetic structure leading to AFM. [ 6 ] With strong ferromagnetic behavior in BMO and strong ferroelectric behavior in BFO, various studies have suggested combining BMO and BFO in order to achieve room-temperature (RT) multiferroicity. [7][8][9][10] One approach is to modify the local spin confi guration of Fe by chemical doping at the B -site. [ 8,9 ] By 50% doping, this simple concept could result in ordered double perovskite ferrites of Bi 3+ 2 Fe6 (TM = transition metal: Cr, Mn, Co, Ni, and Cu) giving antiferromagnetically coupled high spin state of the TM and Fe. However, this concept has not been widely realized due to the lack of cation ordering as a result of negligible differences in ionic valences and ionic radii. [11][12][13][14][15] On the other hand, disordered double perovskites (notably BiFe 0.5 Mn 0.5 O 3 (BFMO) and Bi 2 CoMnO 6 (BCMO)) show a strongly enhanced T C albeit with lower magnetic moment than expected for the ordered structure. [ 16,17 ] Pálová et al. extended the idea of ordered double perovskites by theoretically studying BFMO with an ordered nanoscale checkerboard structure (NCB-BFO/BMO, see Figure 1 a), i.e., columnar B -site ordering. [ 10 ] Their calculations predict that an ordered NCB-BFO/BMO would be ferroelectric and ferrimagnetic (FiM) with M S of 3.8 µ B /Fe-Mn pair and T C of 406 K, as a result of magnetic ordering arising from the superexchange coupling between the neighboring AFM-Fe and FM-Mn. [ 10 ] Unfortunately, spontaneous columnar B -site ordering is not expected and high quality growth of artifi cial 1:1 BFO/BMO superlattices along the 〈110〉 direction is very hard.

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Valence states of transition-metal ions in cubic perovskites SrMn1−xFexO3

Cited by 8 publications

References 14 publications

Structural and magnetic studies of the electron doped manganites Sr_0.65Pr_0.35−xCe_xMnO₃(0.00 ≤x≤ 0.35)

Structural and magnetic studies of the electron doped manganites Sr_0.65Pr_0.35−xCe_xMnO₃(0.00 ≤x≤ 0.35)

Investigation of continuous changes in the electric-field-induced electronic state in Bi_1−xCa_xFeO_3−δ

Interface‐Coupled BiFeO₃/BiMnO₃ Superlattices with Magnetic Transition Temperature up to 410 K

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Valence states of transition-metal ions in cubic perovskites SrMn1−xFexO3

Cited by 8 publications

References 14 publications

Structural and magnetic studies of the electron doped manganites Sr0.65Pr0.35−xCexMnO3(0.00 ≤x≤ 0.35)

Structural and magnetic studies of the electron doped manganites Sr0.65Pr0.35−xCexMnO3(0.00 ≤x≤ 0.35)

Investigation of continuous changes in the electric-field-induced electronic state in Bi1−xCaxFeO3−δ

Interface‐Coupled BiFeO3/BiMnO3 Superlattices with Magnetic Transition Temperature up to 410 K

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Structural and magnetic studies of the electron doped manganites Sr_0.65Pr_0.35−xCe_xMnO₃(0.00 ≤x≤ 0.35)

Structural and magnetic studies of the electron doped manganites Sr_0.65Pr_0.35−xCe_xMnO₃(0.00 ≤x≤ 0.35)

Investigation of continuous changes in the electric-field-induced electronic state in Bi_1−xCa_xFeO_3−δ

Interface‐Coupled BiFeO₃/BiMnO₃ Superlattices with Magnetic Transition Temperature up to 410 K