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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 Perovskite Technetium Oxygen Electronic structure Hybridization |
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 |
URI: | http://dx.doi.org/10.1103/PhysRevLett.106.067201 http://apo.ansto.gov.au/dspace/handle/10238/3096 |
ISSN: | 0031-9007 |
Appears in Collections: | Journal Articles |
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