Microscopic Coexistence of Antiferromagnetic and Spin-Glass States
ORAL
Abstract
The disordered antiferromagnet PbFe1/2Nb1/2O3 (PFN) is investigated in a wide temperature range by combining Mossbauer spectroscopy and neutron diffraction experiments. It is demonstrated that the magnetic ground state is a microscopic coexistence of antiferromagnetic and spin-glass orders. This speromagnet-like phase features frozen-in short-range fluctuations of the Fe3$+$ magnetic moments that are transverse to the long-range ordered antiferromagnetic spin component.
*This work is partially supported by the Swiss National Fund through MANEP.
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