Magnetic spiral in ZnCr2Se4 under pressure up to 10GPa and low T.
The ZnCr2Se4 compound with the spinel structure is of interest as one of objects with magnetoelectric effect [1], in which at 21K occurs a weak tetragonal distortion [2] and below this temperature the DM interaction produces a simple magnetic spiral structure of the SS type (period is 22,5A) [3], whose period decreases synchronously with the increase of the spontaneous strain [4]. To determine the influence of high pressure on the magnetic spiral, we would like to perform a neutron diffraction study at T = 1.5-50K and pressures P = 0-120kbar using high pressure cell of Paris-Edinburg type. The lattice parameter is close to the value of 10A that period of magnetic spiral at a pressure 75kbar virtually coincides with it, and the magnetic structure becomes commensurate. [1] H. Murakawa, Y. Onose, K. Ohgushi, S. Ishiwata, and Y. Tokura, J. Phys. Soc. Jap. 77, 043709 (2008) [2]. R. Kleinberger and R. de Kouchkovsky. CR Acad. Sc.Paris.t.262, Ser.B (1966). [3]. R. J. Plumier, J. Appl. Phys.V.37, No.3, p.964 (1966). [4]. Jun Akimitsu at all. J. Phys. Soc. Japan, V.44, No.1, p.172, (1978).
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SADYKOV Ravil A.; Thomas C. Hansen; IVANOV Alexandre; LELIEVRE BERNA Eddy and I. MIREBEAU. (2018). Magnetic spiral in ZnCr2Se4 under pressure up to 10GPa and low T.. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2538
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