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We investigate reversible inverse magnetostriction in order to study scaling
properties of magnetic hysteresis in the helical antiferromagnetic phase of polycrystalline Dy.
We argue that the experimental method used is more sensitive than studies of conventional
magnetic hysteresis. This advantage allows us to study hysteretic properties of
antiferromagnetic Dy over the temperature ranges, not accessible previously. We introduce
generalized coercivity of magnetoelastic hysteresis and show that it demonstrates, under
different experimental protocols, the same exponents of scaling power laws in the ferro- and
antiferromagnetic phases. The similarity of hindering mechanisms impeding the mobility of
domain walls in antiferromagnetic and ferromagnetic phases is suggested as the reason of the
observed universality of hysteresis scaling.
Keywords: polycrystalline Dy; helical antiferromagnetic phase; magnetic hysteresis; reversible inverse magnetostriction. |
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