We extend our previous theoretical study of Mn-based orthorhombic metamagnets to those that possess large nearest neighbour Mn-Mn separations (d1>3.22A). Based on our calculations, we design and synthesize a series of alloys, CoMnGe_{1-x}P_{x}, to experimentally demonstrate the validity of the model. Unusually, we predict and prepare several metamagnets from two ferromagnetic end-members, thus demonstrating a new example of how to vary crystal structure, within the Pnma symmetry group, to provide highly tunable metamagnetism.
@article{arxiv.1101.2099,
title = {Designed Metamagnetism in CoMnGe_{1-x}P_{x}},
author = {Zsolt Gercsi and Kazuhiro Hono and Karl G. Sandeman},
journal= {arXiv preprint arXiv:1101.2099},
year = {2013}
}