Two-dimensional modulated ferrimagnetic systems (abstract) : 35th annual conference on magnetism and magnetic materials
Miceli, P. F. ; Tarascon, J. M. ; Hull, G. W. ; Remschnig, K. ; McKinnon, W. R. ; Telpis, E. ; LePage, Y. ; McAlister, S. P. ; Pleizier, G. ; Rhyne, J. J. ; Neumann, D. A.
[S.l.] : American Institute of Physics (AIP)
Published 1991
[S.l.] : American Institute of Physics (AIP)
Published 1991
| ISSN: |
1089-7550
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| Source: |
AIP Digital Archive
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| Topics: |
Physics
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| Notes: |
Bi2Sr2MnOy, isomorphic to the high-Tc compound containing Cu, exhibits a displacement modulation driven by the bending of Bi double layers, thus creating a modulated environment for the magnetic MnO2 layers which are 12 A(ring) apart. Neutron scattering results will be presented, showing antiferromagnetic order in zero field and a field-induced transition to weak ferromagnetism. This behavior is a direct consequence of the structural modulation which breaks the symmetry of two otherwise equivalent ordering directions of (010) and (100)−the latter being associated with weak ferromagnetism. Magnetic scattering has been observed at superlattice positions, suggesting that the displacement modulation affects the valence of the magnetic ions. Subtle differences in magnetic behavior are observed in similar compounds where Pb is substituted for Bi and Ca for Sr. These results will be discussed in terms of a modulated magnetic model.
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| Type of Medium: |
Electronic Resource
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| URL: |