Magnetic Correlations in Geometrically Frustrated SrGd2O4
We propose to measure the development of magnetic correlations in SrGd2O4 using the polarised neutron diffractometer D7. SrGd2O4 belongs to a family of compounds with the formula SrLn2O4 (Ln = Lanthanide). The triangular chains of Ln ions along the c-axis make the SrLn2O4 compounds suitable candidates to exhibit geometric frustration. From the recent D20 measurements, we have established that SrGd2O4 undergoes two low-T phase transitions, TN1=2.7 K and TN2=0.5 K (in agreement with our heat capacity results). We have also seen the presence of significant diffuse scattering above the higher temperature transition as well as in the intermediate temperature phase. Using a regular orange cryostat on D7 we will be able to probe the nature of the magnetic correlations on these two phases. It is a unique opportunity to investigate the magnetic diffuse scattering of this powder sample with 160Gd as during the long 2017 shutdown it will entirely be used to grow a single crystal for further investigations.
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PETRENKO Oleg; QURESHI Navid; RIBEROLLES Simon and WILDES Andrew. (2017). Magnetic Correlations in Geometrically Frustrated SrGd2O4. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-32-845
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