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The longitudinal and transversal forced magnetostrictions of a single crystal of samarium metal have been investigated in a static magnetic field up to $45\phantom{\rule{0.3em}{0ex}}\mathrm{T}$. The data show pronounced features of a spin-flop transition initiating at an applied field of about $30\phantom{\rule{0.3em}{0ex}}\mathrm{T}$. The measured forced magnetostriction is about 1 order of magnitude smaller than the spontaneous magnetostriction. Based on a model calculation of the magnetic phase diagram these features have been interpreted within the exchange striction model. The moments of the quasicubic Sm sites enter a spin-flop phase at about $30\phantom{\rule{0.3em}{0ex}}\mathrm{T}$ and ferromagnetic saturation is predicted at $60\phantom{\rule{0.3em}{0ex}}\mathrm{T}$. Similarly the model predicts a spin-flop phase for the hexagonal Sm sites at $140\phantom{\rule{0.3em}{0ex}}\mathrm{T}$ and ferromagnetic saturation at $390\phantom{\rule{0.3em}{0ex}}\mathrm{T}$.

physical review. b, condensed matter and materials physics

Spin-flop transition in samarium metal investigated by capacitance dilatometry in a steady magnetic field of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>45</mml:mn><mml:mspace width="0.3em" /><mml:mi mathvariant="normal">T</mml:mi></mml:mrow></mml:math>

Spin-flop transition in samarium metal investigated by capacitance dilatometry in a steady magnetic field of45T