Strong magnetoelastic effect in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>CeCo</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Fe</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:mi>Si</mml:mi></mml:mrow></mml:math> as Néel order is suppressed

A very strong magnetoelastic effect in the CeCo_{1-x}e_{x}i alloys is reported. The strength of the magnetostrictive effect can be tuned upon changing x The moderate low-temperature linear magnetostriction observed at low Fe concentrations becomes very large (\frac {\Delta L}{L} \left(16 T,2 K\right) =3\times0^{-3} around the critical concentration (x_c \approx0.23) at which the long-range antiferromagnetic order vanishes....