Exploring Chemical and Magnetic Disorders in the Triangular Antiferromagnet Yb(Mg/Zn)GaO4
YbMgGaO4 and YbZnGaO4 are triangular based frustrated antiferromagnets. Structural studies show that the non-magnetic ions, Mg/Zn and Ga, are randomly distributed throughout the non-magnetic lattice, which many believe affect the nature of the magnetic ground state. In YbMgGaO4, the ground state is a controversial quantum spin liquid, whereas YbZnGaO4 is characterised as a spin glass. We now ask, how do the average and local structures of YbMgGaO4 and YbZnGaO4 really compare, and how does this affect the nature of the disordered magnetic ground state that is selected in each? To answer this, we propose a comparative study between YbMgGaO4 and YbZnGaO4, in which we seek to explore the nature of their average crystal structures (D2B) as well as the diffuse scattering arising from short-range structural and magnetic correlations (D7) in these materials. From these experiments we stand to gain a unique insight that the role of chemical disorder plays in their magnetic ground state selections.
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GRAHAM Jennifer; ABDELDAIM Aly; L. Clark; PACHOUD Elise; TUSTAIN Katherine and WILDES Andrew. (2021). Exploring Chemical and Magnetic Disorders in the Triangular Antiferromagnet Yb(Mg/Zn)GaO4. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-32-921
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