Antiferromagnetic ordering and paramagnetic behavior of ferromagnetic Cu6 and Cu18 clusters in BaCuO2+x

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Z. R. Wang
  • X. L. Wang
  • J. A. Fernandez-Baca
  • D. C. Johnston
  • D. Vaknin

Detail(s)

Original languageEnglish
Pages (from-to)402-404
Journal / PublicationScience
Volume264
Issue number5157
Publication statusPublished - 1994
Externally publishedYes

Abstract

Magnetization and neutron diffraction measurements on polycrystalline BaCuO2+x revealed a combination of magnetic behaviors. The Cu 6 ring clusters and Cu18 sphere clusters in this compound had ferromagnetic ground states with large spins 3 and 9, respectively. The Cu6 rings ordered antiferromagnetically below the Néel temperature TN = 15±0.5 kelvin, whereas the Cu18 spheres remained paramagnetic down to 2 kelvin. The ordered moment below T N was 0.89(5) Bohr magnetons per Cu in the Cu6 rings, demonstrating that quantum fluctuation effects are small in these atomic clusters. The Cu18 clusters are predicted to exhibit ferromagnetic intercluster order below about 1 kelvin.

Citation Format(s)

Antiferromagnetic ordering and paramagnetic behavior of ferromagnetic Cu6 and Cu18 clusters in BaCuO2+x. / Wang, Z. R.; Wang, X. L.; Fernandez-Baca, J. A.; Johnston, D. C.; Vaknin, D.

In: Science, Vol. 264, No. 5157, 1994, p. 402-404.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review