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Abstract: Magnetic critical scaling in URu2-xRexSi2 single crystals continuouslyevolves as the ferromagnetic critical temperature is tuned towards zero viachemical substitution. As the quantum phase transition is approached, thecritical exponents gamma and delta-1 decrease to zero in tandem with thecritical temperature and ordered moment, while the exponent beta remainsconstant. This novel trend distinguishes URu2-xRexSi2 from stoichiometricquantum critical ferromagnets and appears to reflect an underlying competitionbetween Kondo and ferromagnetic interactions.



Author: Nicholas P. Butch, M. Brian Maple

Source: https://arxiv.org/







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