Antiferromagnetism in a technetium oxide. Structure of CaTcO3.
The technetium perovskite CaTcO(3) has been synthesized. Combining synchrotron X-ray and neutron diffraction, we found that CaTcO(3) is an antiferromagnetic with a surprisingly high Neel temperature of ∼800 K. The transition to the magnetic state does not involve a structural change, but there is obvious magnetostriction. Electronic structure calculations confirm the experimental results.
Bragg Institute, Australian Nuclear Science and Technology Organisation, Private Mail Bag 1, Menai, NSW 2234 Australia.
Maxim
M
Avdeev
Gordon J
GJ
Thorogood
Melody L
ML
Carter
Brendan J
BJ
Kennedy
Jimmy
J
Ting
David J
DJ
Singh
Kia S
KS
Wallwork