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Title: High temperature magnetic ordering in the 4d perovskite SrTcO3
Authors: Rodriguez, EE
Poineau, F
Llobet, A
Kennedy, BJ
Avdeev, M
Thorogood, GJ
Carter, ML
Seshadri, R
Singh, DJ
Cheetham, AK
Keywords: Antiferromagnetism
Electronic structure
Issue Date: 7-Feb-2011
Publisher: American Physical Society
Citation: Rodriguez, E. E., Poineau, F., Llobet, A., Kennedy, B. J., Avdeev, M., Thorogood, G. J., Carter, M. L., Seshadri, R., Singh, D. J., & Cheetham, A. K. (2011). High temperature magnetic ordering in the 4d perovskite SrTcO3. Physical Review Letters, 106(6), 067201. doi:10.1103/PhysRevLett.106.067201
Abstract: We present evidence for possibly the highest magnetic ordering temperature in any compound without 3d transition elements. Neutron powder diffraction measurements, at both time-of-flight and constant wavelength sources, were performed on two independently prepared SrTcO3 powders. SrTcO3 adopts a distorted perovskite structure with G-type antiferromagnetic ordering and has a moment of 1.87(4)μB per Tc cation at room temperature with an extraordinarily high Néel point close to 750°C. Electronic structure calculations reveal extensive mixing between the technetium 4d states and oxygen states proximal to the Fermi level. This hybridization leads to a close relationship between magnetic ordering temperature and moment formation in SrTcO3. © 2011, American Physical Society
Gov't Doc #: 3225
ISSN: 0031-9007
Appears in Collections:Journal Articles

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