|Title||In situ X-ray powder diffraction study of Ho5Ge4|
|Publication Type||Journal Article|
|Year of Publication||2014|
|Authors||Singh, NK, Mudryk, Y, Pecharsky, VK, Gschneidner, KA|
|Journal||Journal of Applied Physics|
|Type of Article||Article|
In Ho5Ge4 the magnetostructural transition (MST) from high temperature paramagnetic Sm5Ge4-type (O-II type) orthorhombic structure to a new low temperature antiferromagnetic (AFM) monoclinic structure (M beta-structure; the distortion occurs in the ac-plane) results in discontinuities of 400, 400, and 300 ppm along a, b, and c axes, respectively. During MST the unit cell volume exhibits discontinuity of 1000 ppm, and changes in both inter and intra slab bonds are less than 2%. In the AFM state the application of 35 kOe magnetic field leads to a partial reconstruction of the high temperature O-II structure, which is accompanied with a large magnetostriction. The strain energy associated with magnetostriction effects leads to an incomplete field driven MST in the magnetically ordered state. (C) 2014 AIP Publishing LLC.
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