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Volumn 72, Issue 5, 2005, Pages

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

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EID: 33644950501     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.72.052406     Document Type: Article
Times cited : (7)

References (23)
  • 1
    • 0034696977 scopus 로고    scopus 로고
    • SCIEAS 0036-8075 10.1126/science.288.5465.462
    • Y. Tokura and N. Nagaosa, Science SCIEAS 0036-8075 10.1126/science.288. 5465.462 5465, 462 (2000).
    • (2000) Science , vol.5465 , pp. 462
    • Tokura, Y.1    Nagaosa, N.2
  • 2
    • 0009499934 scopus 로고
    • PHRVAO 0031-899X 10.1103/PhysRev.100.545
    • E. O. Wollan and W. C. Koehler, Phys. Rev. PHRVAO 0031-899X 10.1103/PhysRev.100.545 100, 545 (1955);
    • (1955) Phys. Rev. , vol.100 , pp. 545
    • Wollan, E.O.1    Koehler, W.C.2
  • 3
    • 0542442371 scopus 로고
    • PHRVAO 0031-899X 10.1103/PhysRev.100.564
    • J. B. Goodenough, Phys. Rev. PHRVAO 0031-899X 10.1103/PhysRev.100.564 100, 564 (1955).
    • (1955) Phys. Rev. , vol.100 , pp. 564
    • Goodenough, J.B.1
  • 7
    • 0038778489 scopus 로고    scopus 로고
    • PRBMDO 0163-1829 10.1103/PhysRevB.67.134401
    • D. I. Khomskii and K. I. Kugel, Phys. Rev. B PRBMDO 0163-1829 10.1103/PhysRevB.67.134401 67, 134401 (2003).
    • (2003) Phys. Rev. B , vol.67 , pp. 134401
    • Khomskii, D.I.1    Kugel, K.I.2
  • 8
    • 0033902088 scopus 로고    scopus 로고
    • JCRGAE 0022-0248 10.1016/S0022-0248(99)00767-8
    • S. N. Barilo, J. Cryst. Growth JCRGAE 0022-0248 10.1016/S0022-0248(99) 00767-8 211, 480 (2000).
    • (2000) J. Cryst. Growth , vol.211 , pp. 480
    • Barilo, S.N.1
  • 10
    • 0037043001 scopus 로고    scopus 로고
    • PRLTAO 0031-9007 10.1103/PhysRevLett.89.027202
    • J. Dho, W. S. Kim, and N. H. Hur, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.89.027202 89, 027202 (2002).
    • (2002) Phys. Rev. Lett. , vol.89 , pp. 027202
    • Dho, J.1    Kim, W.S.2    Hur, N.H.3
  • 12
    • 33644949656 scopus 로고    scopus 로고
    • High-resolution neutron powder diffraction measurements on the grounded crystallites of LBMF were performed on the BT-1 powder diffractometer at NCNR, using a monochromatic beam with λ=1.5402 (1), produced by a Cu(311) monochromator. Collimations were 15′, 20′, and 7′ arc before and after the monochromator, and before detectors, respectively. The crystal structure was Rietveld refined using the program GSAS [C. Larson and R. B. Von Dreele (unpublished)] and an orthorhombic perovskite model with Imma symmetry. The a and c lattice parameters were found to be nearly the same within our resolution and were subsequently constrained as equal in the structural model, without incrementing the fitting residuals. The cationic concentrations were kept fixed at the values found by x-ray fluorescence measurements; no significant improvement in the fit was obtained when the La/Ba and Mn/Fe ratios were allowed to vary freely. The occupancy in the oxygen sites [ν (O)] was initially refined at 300 K, yielding ν (O) =1.04 (2), and was subsequently fixed at unity for all T. The fitting residuals were Rpb =6.4%, Rwpb =6.8%, and χ2 =1.05 at 300 K, and Rpb =7.2%, Rwpb=9.1%, and χ2 =1.42 at 10 K (25 variables). The refined lattice and atomic parameters at 300 K are a=c=5.533 04 (7), b=7.8475 (2); L/Ba (0,1/4,-0.013 (2)) with Biso =0.9 (1) 2; Mn/Fe (1/2,0,0) with Biso =3.0 (4) 2; O1 (1/2,1/4,0.032 (1)) with B11 = B33 =1.9 (2) 2 and B22 =1.7 (2) ; O2 (1/4,-0.0094 (6), 1/4) with B11 = B33 =0.51 (6) 2, B22 =2.2 (2) 2, and B13 =0.9 (1) 2. Quoted errors are statistical only, and represent one standard deviation. High-resolution x-ray powder diffraction measurements were performed in a limited angular interval covering a few Bragg peaks on the XRD-1 beamline at Laboratório Nacional de Luz Síncrotron (LNLS), using a double-bounce Si(111) monochromator and a Ge(111) analyser, with λ=1.282. The lattice parameters below and above room temperature were obtained using neutron and x-ray data, respectively.
    • Larson, C.1    Von Dreele, R.B.2
  • 13
    • 0001676185 scopus 로고
    • PRBMDO 0163-1829 10.1103/PhysRevB.46.4511
    • M. Abbate, Phys. Rev. B PRBMDO 0163-1829 10.1103/PhysRevB.46.4511 46, 4511 (1992).
    • (1992) Phys. Rev. B , vol.46 , pp. 4511
    • Abbate, M.1
  • 14
    • 0035384290 scopus 로고    scopus 로고
    • CHREAY 0009-2665 10.1021/cr9900681
    • For a review, see F. de Groot, Chem. Rev. (Washington, D.C.) CHREAY 0009-2665 10.1021/cr9900681 101, 1779 (2001).
    • (2001) Chem. Rev. (Washington, D.C.) , vol.101 , pp. 1779
    • De Groot, F.1
  • 16
    • 16644382992 scopus 로고    scopus 로고
    • PRBMDO 0163-1829 10.1103/PhysRevB.59.1263
    • A. Simopoulos, Phys. Rev. B PRBMDO 0163-1829 10.1103/PhysRevB.59.1263 59, 1263 (1999).
    • (1999) Phys. Rev. B , vol.59 , pp. 1263
    • Simopoulos, A.1
  • 17
    • 0001022446 scopus 로고    scopus 로고
    • PRBMDO 0163-1829 10.1103/PhysRevB.58.11435
    • Soft x-ray absorption spectroscopy (XAS) measurements at the Mn and Fe 2p edges were performed on the beamline SGM at LNLS, using a spherical grating monochromator with energy resolution ∼0.6 eV (FWHM). The spectra were collected in the total-electron-yield mode, the incident beam being focused on a fresh broken surface of the LBMF crystal. A single crystal of La0.7 Sr0.3 Mn O3 was used as a reference sample for the Mn 2p edge [E. Granado, Phys. Rev. B PRBMDO 0163-1829 10.1103/PhysRevB.58.11435 58, 11435 (1998)]. A simulation for the Fe 2p edge was performed using the crystal-field multiplet approach (Ref.), using 45% and 63% of the atomic values for the dd and pd Slater integrals, respectively, and a crystal-field splitting between t2g and eg states of 10Dq=1.5 eV for point group Oh. Hard-XAS measurements were carried out on the XAS beamline at LNLS, using a double-bounce Si(111) monochromator. The energy resolution was better than ∼2.0 eV (FWHM). The spectra were collected in transmission mode. A ceramic sample of CaMn O3 grown by conventional solid-state reaction, and a single crystal of LaMn O3.00 grown by optical floating zone method, were used as reference samples.
    • (1998) Phys. Rev. B , vol.58 , pp. 11435
    • Granado, E.1
  • 18
    • 0038190821 scopus 로고    scopus 로고
    • PRBMDO. 0163-1829. 10.1103/PhysRevB.56.8183
    • G. Subías, Phys. Rev. B PRBMDO 0163-1829 10.1103/PhysRevB.56.8183 56, 8183 (1997);
    • (1997) Phys. Rev. B , vol.56 , pp. 8183
    • Subías, G.1
  • 19
    • 0000517404 scopus 로고    scopus 로고
    • PRBMDO 0163-1829 10.1103/PhysRevB.61.R9237
    • F. Bridges, Phys. Rev. B PRBMDO 0163-1829 10.1103/PhysRevB.61.R9237 61, R9237 (2000);
    • (2000) Phys. Rev. B , vol.61 , pp. 9237
    • Bridges, F.1
  • 20
    • 0034897420 scopus 로고    scopus 로고
    • PRBMDO 0163-1829 10.1103/PhysRevB.63.214405
    • F. Bridges, Phys. Rev. B PRBMDO 0163-1829 10.1103/PhysRevB.63.214405 63, 214405 (2001);
    • (2001) Phys. Rev. B , vol.63 , pp. 214405
    • Bridges, F.1
  • 21
    • 1842494321 scopus 로고    scopus 로고
    • PRBMDO 0163-1829 10.1103/PhysRevB.64.014413
    • A. Yu. Ignatov, N. Ali, and S. Khalid, Phys. Rev. B PRBMDO 0163-1829 10.1103/PhysRevB.64.014413 64, 014413 (2001).
    • (2001) Phys. Rev. B , vol.64 , pp. 014413
    • Yu. Ignatov, A.1    Ali, N.2    Khalid, S.3
  • 23
    • 0035796137 scopus 로고    scopus 로고
    • EULEEJ 0295-5075 10.1209/epl/i2001-00401-5
    • D. I. Khomskii and K. I. Kugel, Europhys. Lett. EULEEJ 0295-5075 10.1209/epl/i2001-00401-5 55, 208 (2001).
    • (2001) Europhys. Lett. , vol.55 , pp. 208
    • Khomskii, D.I.1    Kugel, K.I.2


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.