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Author Jorgensen, J. D. ♦ Chmaissem, O. ♦ Shaked, H. ♦ Short, S. ♦ Klamut, P. W. ♦ Dabrowski, B. ♦ Tallon, J. L.
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ♦ FERROMAGNETISM ♦ HYPOTHESIS ♦ HYSTERESIS ♦ NEUTRONS
Abstract Neutron powder-diffraction measurements for RuSr{sub 2}GdCu{sub 2}O{sub 8} and RuSr{sub 2}EuCu{sub 2}O{sub 8} show that both compounds, below their magnetic ordering temperatures of 133 and 120 K, respectively, have the same G-type antiferromagnetic structure in which Ru moments are antiparallel in all three crystallographic directions. The ferromagnetism in these compounds, which is clearly indicated by hysteresis loops, can be explained if the Ru moments are canted to give a net moment perpendicular to the c axis. In such a model, one would expect an induced ferromagnetic ordering of the magnetic Gd ions, which have large ({approx}7{mu}{sub B}) moments, as a result of the net field at the Gd site, while Eu, being nonmagnetic, would exhibit no such response. The dramatically larger hysteresis loops for RuSr{sub 2}GdCu{sub 2}O{sub 8} compared to those for RuSr{sub 2}EuCu{sub 2}O{sub 8} are consistent with this hypothesis.
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 2001-02-01
Publisher Place United States
Journal Physical Review B
Volume Number 63
Issue Number 5


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