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Spin-ice dynamics of pyrochlore Dy2GaSbO7 with enhanced Pauling zero-point entropy

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arxiv 2104.07890 v1 pith:DEAKFUFE submitted 2021-04-16 cond-mat.mtrl-sci cond-mat.str-el

Saikat Nandi , Yatramohan Jana , Jahangir Alam , Pallab Bag , S.S. Islam , Ramesh Nath This is my paper · ORCID
classification cond-mat.mtrl-scicond-mat.str-el
keywords dy2gasbo7spin-icedynamicsenhancedentropypyrochlorezero-pointb-site
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We report the low-temperature magnetothermal properties and spin dynamics of a mixed pyrochlore, Dy2GaSbO7 through the coordination of measurements of dc magnetization, ac susceptibility, and heat capacity, and CF computation. In Dy2GaSbO7, the spins freeze at temperature Tice = 3.1 K, corresponding to dynamical spin-freezing into a disordered state in compliance with the spin-ice rules, but with enhanced zero-point entropy, unlike cannonical dipolar spin-ice materials, Dy2Ti2O7 and Ho2Ti2O7, due to random disorder and varied chemical pressure of B-site (GaSb tetrahedra) ions.

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