Magnetic hyperfine field at s-p impurities on Laves phase compounds

► The hyperfine field exhibits different behavior when one goes from RFe2 to RCo2. ► The hyperfine field has two contributions, allowing the identification of the origin of different behavior in RFe2 and RCo2. ► The two contributions for the hyperfine field have the same sign in Cd:RCo2. ► In RNi2 only one of the contributions is present.