Crossref journal-article
Walter de Gruyter GmbH
Zeitschrift für Kristallographie - Crystalline Materials (374)
Abstract

Abstract The recent progress of the accurate charge density studies by the Maximum Entropy Method(MEM) utilizing X-ray powder diffraction is reviewed with some examples. Results for PrBCO (PrBa2Cu3O7-δ), YBCO (YBa2Cu3O7-δ), C60 superconductors (Rb2CsC60, K2RbC60, Na2RbC60) and the layered manganite, NdSr2Mn2O7, which is well known as colossal magnetoresistive (CMR)-related material, are given. For non-super conductor, PrBCO, it is found in the MEM charge density that there exist directional robes of the charge density from Pr atom toward the O atoms in the CuO2 conduction planes. On the other hand, for a very well known high Tc super conductor, YBCO, appreciable charge densities in the interatomic region around the Y atom is not recognized in the MEM charge density. The distinct difference of the charge densities between PrBCO and YBCO presents clear experimental evidence of the hybridization between Pr(4f)–O(2pπ) orbitals which supports the idea that the hole trapping by the hybridizes states suppresses the superconductivity in PrBCO. The MEM charge densities of the fullerene superconductors, Rb2CsC60, K2RbC60 and Na2RbC60, show distinct structural differences from that of non-superconductors, C60 and Li2CsC60, reflecting the superconducting properties. And the charge deficiencies of the doped metal atoms, which should be associated with charge transfer from the metal atoms to the C60 molecule seems to have strong correlation to the superconducting transition temperature, Tc. As the bigger the charge charge trnsfer, the higher the Tc. In the accurate MEM charge density of antiferromagnetic manganite, NdSr2Mn2O7,the direct imaging of spontaneous ordering of the dx 2-y 2 orbital indicating anisotropic exchange couplings between the local-spins on the Mn sites, which causes an unique layered-type spin order. The theoretical background of the MEM is also mentioned in some detail.

Bibliography

Takata, M., Nishibori, E., & Sakata, M. (2001). Charge density studies utilizing powder diffraction and MEM. Exploring of high Tc superconductors, C60 superconductors and manganites. Zeitschrift Für Kristallographie - Crystalline Materials, 216(2), 71–86.

Authors 3
  1. M. Takata (first)
  2. E. Nishibori (additional)
  3. M. Sakata (additional)
References 70 Referenced 117
  1. 10.1103/PhysRevB.57.R5594 / Phys. Rev. by Akimoto T. (1998)
  2. 10.1103/PhysRev.100.675
  3. 10.1016/0921-4534(93)90174-O / Physica by Andersson M. (1993)
  4. 10.1107/S0567739474000337 / Acta Crystallogr. by Becker P. J. (1974)
  5. {'key': 'p_40', 'first-page': '736', 'volume': '80', 'author': 'Bendele G. M.', 'year': '1998', 'journal-title': 'Phys. Rev.'} / Phys. Rev. by Bendele G. M. (1998)
  6. 10.1107/S010876738800354X / Acta Crystallogr. by Bricogne G. (1988)
  7. 10.1103/PhysRevB.34.1314 / Phys. Rev. by van Camp P. E. (1986)
  8. 10.1103/PhysRevLett.33.1339
  9. 10.1038/298049a0
  10. {'key': 'p_45', 'first-page': '4127', 'volume': '18', 'author': 'Denteneer P. J. H.', 'year': '1985', 'journal-title': 'J. Phys.'} / J. Phys. by Denteneer P. J. H. (1985)
  11. 10.1107/S0108767393012802 / Acta Crystallogr. by De Vries R. Y. (1994)
  12. 10.1103/PhysRevLett.70.3471
  13. 10.1038/352701a0
  14. 10.1103/PhysRevLett.82.4452
  15. 10.1103/PhysRevB.41.6372 / Phys. Rev. by Guo G. Y. (1990)
  16. 10.1103/PhysRevLett.42.662
  17. 10.1143/JJAP.38.L65
  18. 10.1016/S0167-2738(98)00033-2
  19. 10.7567/JJAPS.38S1.93 / Jap. J. Appl. Phys. by Ikeda T. (1999)
  20. 10.1107/S0108768194010360 / Acta Crystallogr. by Iversen B. B. (1995)
  21. 10.1080/01418619508236261
  22. 10.1126/science.264.5157.413
  23. 10.1080/13642818408246503 / Phil. Mag. by Jones R. (1984)
  24. 10.1103/PhysRevB.23.2897 / Phys. Rev. by Kenton A. C. (1981)
  25. 10.1143/JPSJ.63.4521
  26. 10.1088/0953-8984/5/44/015
  27. 10.1143/JJAP.38.5535
  28. 10.1107/S0021889892012883
  29. 10.1107/S0108767394006173 / Acta Crystallogr. by Kumazawa S. (1995)
  30. 10.1126/science.270.5238.961
  31. 10.1126/science.272.5258.80
  32. 10.1103/PhysRevB.57.R13993 / Phys. Rev. by Maezono R. (1998)
  33. 10.1143/JPSJ.67.405
  34. 10.1103/PhysRevB.61.R7827 / Phys. Rev. by Moritomo Y. (2000)
  35. 10.1103/PhysRevLett.80.1932
  36. 10.1016/0921-4534(90)90572-V
  37. 10.1143/JJAP.38.504
  38. 10.1016/S0009-2614(98)01133-6
  39. 10.1088/0953-8984/2/38/005
  40. 10.1209/0295-5075/32/4/009
  41. 10.1107/S0021889869006558
  42. 10.1002/pssb.2221430214
  43. 10.1107/S0108767386098860 / Acta Crystallogr. by Saka T. (1986)
  44. 10.1107/S0021889890008214
  45. 10.1107/S0108767389012377 / Acta Crystallogr. by Sakata M. (1990)
  46. 10.1107/S0108768192001770 / Acta. Crystallogr. by Sakata M. (1992)
  47. 10.1038/328604a0
  48. 10.1107/S0108767386099312 / Acta Crystallogr. by Spackman M. A. (1986)
  49. 10.1107/S0108767391001447 / Acta Crystallogr. by Spackman M. A. (1991)
  50. 10.1038/351632a0
  51. 10.1515/zna-1993-1-219 / Z. Naturforsch. by Takata M. (1993)
  52. 10.1143/JJAP.38.122
  53. 10.1143/JPSJ.68.2190
  54. 10.1016/0921-4534(96)00082-2 / Physica by Takata M. (1996)
  55. 10.1103/PhysRevLett.78.3330
  56. 10.1107/S0108767395014917
  57. 10.1107/S0108767393011523 / Acta Crystallogr. by Takata M. (1994)
  58. 10.1016/0921-4534(96)80010-4 / Physica by Takata M. (1996)
  59. 10.1038/377046a0
  60. {'key': 'p_104', 'first-page': '85', 'volume': '35', 'author': 'Takata M.', 'year': '1992', 'journal-title': 'Adv. X-Ray Anal.'} / Adv. X-Ray Anal. by Takata M. (1992)
  61. 10.1038/352222a0
  62. 10.1209/0295-5075/23/1/010
  63. 10.1103/PhysRevB.49.12307 / Phys. Rev. by Tanigaki K. (1994)
  64. 10.1103/PhysRevB.24.3417
  65. 10.1107/S0021889883011176
  66. 10.1016/S0022-3697(99)00026-8
  67. 10.1016/0038-1098(74)90938-7
  68. 10.1103/PhysRevB.26.5668 / Phys. Rev. by Yin M. T. (1982)
  69. 10.1103/PhysRevLett.50.1172
  70. 10.1103/PhysRevB.21.4785 / Phys. Rev. by Zunger A. (1980)
Dates
Type When
Created 21 years, 8 months ago (Dec. 5, 2003, 9:19 a.m.)
Deposited 4 months, 3 weeks ago (April 8, 2025, 5:13 a.m.)
Indexed 1 month ago (July 27, 2025, 3:27 a.m.)
Issued 24 years, 6 months ago (Feb. 1, 2001)
Published 24 years, 6 months ago (Feb. 1, 2001)
Published Online 15 years, 11 months ago (Sept. 25, 2009)
Published Print 24 years, 6 months ago (Feb. 1, 2001)
Funders 0

None

@article{Takata_2001, title={Charge density studies utilizing powder diffraction and MEM. Exploring of high Tc superconductors, C60 superconductors and manganites}, volume={216}, ISSN={2194-4946}, url={http://dx.doi.org/10.1524/zkri.216.2.71.20335}, DOI={10.1524/zkri.216.2.71.20335}, number={2}, journal={Zeitschrift für Kristallographie - Crystalline Materials}, publisher={Walter de Gruyter GmbH}, author={Takata, M. and Nishibori, E. and Sakata, M.}, year={2001}, month=feb, pages={71–86} }