Effects of pressure on the magnetic-structural and Griffiths-like transitions in Dy5Si3Ge
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AuthorMarcano Aguado, Noelia; Algarabel Lafuente, Pedro A.; Rodríguez Fernández, Jesús; Magén Domínguez, César; Morellón Alquézar, Luis A.; Singh, Niraj K.; Gschneidner, Karl A.; Pecharsky, Vitalij K.; Ibarra García, M. Ricardo
Magnetization studies have been performed on a polycrystalline sample of Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and hydrostatic pressure (up to 10 kbar) in the 5–300 K temperature range. The anomalous behavior of the magnetic susceptibility indicates that a Griffiths-like phase exists at low magnetic fields and pressures up to 10 kbar. We present evidence that the high-temperature second-order ferromagnetic transition can be coupled with the low-temperature first-order crystallographic transformation into a single first-order magnetic-crystallographic transformation using a magnetic field and hydrostatic pressure as tuning parameters. The effect of pressure on the Griffiths-like phase is reported and analyzed in the framework of the complex competition between the interslab and intraslab magnetic interactions.
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