Titanium pyrochlore magnets : how much can be learned from magnetization measurements?
Petrenko, O. A., Lees, M. R. and Balakrishnan, G.. (2011) Titanium pyrochlore magnets : how much can be learned from magnetization measurements? Journal of Physics: Condensed Matter, Vol.23 (No.16). article no.164218. ISSN 0953-8984Full text not available from this repository.
Official URL: http://dx.doi.org/10.1088/0953-8984/23/16/164218
We report magnetization data for several titanium pyrochlore systems measured down to 0.5 K. The measurements, performed on single crystal samples in fields of up to 7 kOe, have captured the essential elements of the previously reported phase transitions in these compounds and have also revealed additional important features overlooked previously either because of the insufficiently low temperatures used, or due to limitations imposed by polycrystalline samples. For the spin-ice pyrochlores Dy(2)Ti(2)O(7) and Ho(2)Ti(2)O(7), an unusually slow relaxation of the magnetization has been observed in lower fields, while the magnetization process in higher fields is essentially hysteresis-free and does not depend on sample history. For the XY pyrochlore Er(2)Ti(2)O(7), the magnetic susceptibility shows nearly diverging behaviour on approach to a critical field, H(C) = 13.5 kOe, above which the magnetization does not saturate but continues to grow at a significant rate. For the Heisenberg pyrochlore Gd(2)Ti(2)O(7), the magnetic susceptibility shows a pronounced change of slope at both transition temperatures, T(N1) = 1.02 K and T(N2) = 0.74 K, contrary to the earlier reports.
|Item Type:||Journal Article|
|Divisions:||Faculty of Science > Physics|
|Journal or Publication Title:||Journal of Physics: Condensed Matter|
|Publisher:||Institute of Physics Publishing Ltd.|
|Page Range:||article no.164218|
|Funder:||Advantage West Midlands (AWM) , European Regional Development Fund (ERDF) , Engineering and Physical Sciences Research Council (EPSRC) UK|
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