Coexisting Magnetic Order and Cooperative Paramagnetism in the Stuffed Pyrochlore Tb_{2+x}Ti_{2-2x}Nb_xO_7

Neutron scattering and magnetization measurements have been performed on the stuffed pyrochlore system Tb2+xTi2-2xNbxO7. We find that despite the introduction of chemical disorder and increasingly antiferromagnetic interactions, a spin glass transition does not occur for T >= 1.5 K and cooperativ...

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Bibliographic Details
Published in:arXiv.org 2010-01
Main Authors: Ueland, B G, Gardner, J S, Williams, A J, Dahlberg, M L, Kim, J G, Qiu, Y, Copley, J R D, Schiffer, P, Cava, R J
Format: Article
Language:English
Subjects:
Antiferromagnetism
External pressure
Neutron scattering
Neutrons
Organic chemistry
Paramagnetism
Spin glasses
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Summary:Neutron scattering and magnetization measurements have been performed on the stuffed pyrochlore system Tb2+xTi2-2xNbxO7. We find that despite the introduction of chemical disorder and increasingly antiferromagnetic interactions, a spin glass transition does not occur for T >= 1.5 K and cooperative paramagnetic behavior exists for all x. For x = 1, Tb3NbO7, an antiferromagnetically ordered state coexisting with cooperative paramagnetic behavior is seen without applying any external fields or pressure, a situation advantageous for studying this cooperative behavior.
ISSN:2331-8422
DOI:10.48550/arxiv.1001.2021