Interplay of metamagnetic and structural transitions in Ca${}_{2-x}$Sr${}_x$RuO${}_4$

Abstract

Metamagnetism in layered ruthenates has been interpreted as a novel kind of quantum critical behavior. In an external magnetic field, Ca${}_{2-x}$Sr${}_x$RuO${}_4$ undergoes a metamagnetic transition accompanied by a pronounced magnetostriction effect. In this paper we present a mean-field study for a microscopic model that naturally reproduces the key features of this system. The phase diagram calculated is equivalent to the experimental $T$-$x$ phase diagram. The presented model also gives a good basis to discuss the critical metamagnetic behavior measured in the system.

8 pages, 7 figures

References in corpus (5)

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