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Electronic structure of Fe and magnetism in the 3d/5d double perovskites Ca2FeReO6 and Ba2FeReO6

Autor: Julio C. Cezar, C. Azimonte, Jagannatha Gopalakrishnan, E. Granado, Kannadka Ramesha

Publikováno v: Physical Review B. 99

The Fe electronic structure and magnetism in (i) monoclinic Ca2FeReO6 with a metal-insulator transition at T-MI similar to 140 K and (ii) quasicubic half-metallic Ba2FeReO6 ceramic double perovskites are probed by soft x-ray absorption spectroscopy (

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::267c23c9b6b76bec7ade92b863389128
https://doi.org/10.1103/physrevb.99.195118

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Polar atomic displacements in multiferroics observed via anomalous x-ray diffraction

Autor: C. Azimonte, Eduardo Granado, Sang-Wook Cheong, H. Terashita, S. Park

Publikováno v: Physical Review B. 81

The minute polar atomic displacements in multiferroics are shown to be within the reach of crystallography. A nonconventional methodology with anomalous x-ray diffraction is employed to investigate such displacements in ${\text{DyMn}}_{2}{\text{O}}_{

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2cd8cffd2fd55f4728978b6f67365f97
https://doi.org/10.1103/physrevb.81.012103

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Incipient Orbital Order in Half-MetallicBa2FeReO6

Autor: Eduardo Granado, J. Gopalakrishnan, C. Azimonte, Qingzhen Huang, Julio C. Cezar, Kannadka Ramesha, Jeffrey W. Lynn, J. C. P. Campoy

Publikováno v: Physical Review Letters. 98

Largely unquenched Re 5d orbital magnetic moments in half-metallic $Ba_2FeReO_6$ drive a symmetry lowering transition from a cubic paramagnet to a compressed tetragonal (c/a < 1) ferrimagnet below TC\sim 305 K, with a giant linear magnetoelastic cons

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd5d15fe41bb4d3a119f25c8b96da50e
https://doi.org/10.1103/physrevlett.98.017204

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Strong orbital correlations in a Fe-substituted spin-glass-manganite

Autor: Jeffrey W. Lynn, Aline Y. Ramos, Ricardo R. Urbano, Eduardo Granado, S. V. Shiryaev, G. L. Bychkov, Carlos A. Pérez, Sergei N. Barilo, Raquel A. Souza, Narcizo M. Souza-Neto, C. Azimonte

Publikováno v: Physical Review B. 72

The compound La{sub 0.66}Ba{sub 0.40}Mn{sub 0.61}Fe{sub 0.33}O{sub 3} shows anisotropic magnetic correlations with no long-range order. Specific heat measurements suggest these correlations represent the bulk. Orbital correlations of Mn{sup 3+}e{sub

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::80e2a2b2b66c7dfbbd6b8e74e1b93842
https://doi.org/10.1103/physrevb.72.052406

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Estimate of control voltage tolerances for a photo-electron analyzer of toroidal design

Autor: Anton Tadich, J.D. Riley, C. Azimonte, A. R. B. de Castro, R.C.G. Leckey

Publikováno v: Brazilian Journal of Physics, Volume: 33, Issue: 4, Pages: 788-791, Published: DEC 2003
Brazilian Journal of Physics v.33 n.4 2003
Brazilian Journal of Physics
Sociedade Brasileira de Física (SBF)
instacron:SBF
Scopus-Elsevier

We have run electron optics simulations and determined the tolerance in the control voltages of all elements (retarding input lens, analyzer, accelerating exit lens) of the La Trobe University photoelectron analyzer, recently redesigned to reach a sp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::baf3c9bb497e4ef1a69664b7efe75881
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332003000400031&lng=en&tlng=en

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Experimental exploration of the origin of magnetostriction in single crystalline iron

Autor: Thomas A. Lograsso, S. Pascarelli, Qingfeng Xing, M. P. Ruffoni, C. Azimonte, Dean J. Miller

Publikováno v: Applied Physics Letters. 97:072508

The magnetostrictive atomic strain in a pure Fe single crystal was measured by differential x-ray absorption spectroscopy. The obtained tetragonal magnetostriction constant, (3/2)λ100, was determined to be 45 ppm, consistent with the previously repo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2161616f9ae14572bb47dde8db71735f
https://doi.org/10.1063/1.3481083

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Investigation of the local Fe magnetic moments at the grain boundaries of the Ca2FeReO6 double perovskite

Autor: Kannadka Ramesha, Julio C. Cezar, Jagannatha Gopalakrishnan, E. Granado, C. Azimonte

Publikováno v: Journal of Applied Physics. 101:09H115

The local Fe ferromagnetic (FM) moment at the grain boundaries of a ceramic sample of Ca2FeReO6 double perovskite was investigated by means of x-ray magnetic circular dichroism spectroscopy at the Fe L-2,L-3 edges and compared to the overall bulk mag

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b1744754a14ef64e213f71608d2ac0af
https://doi.org/10.1063/1.2714317

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