High-resolution electrical resistivity data ( p , d p / d T ) revealed a fascinating succession of fluctuating modes and magnetic phases in Gd,_,Y, crystals at the onset of helimagnetism (x, -0.3). An improved magnetic phase diagram is proposed uhich contains two multicritical points near x,. Our data refute the suggested existence of a Lifshitz point in G d , -xY, at ,Y-0.3. i.e. the coexistence of ferromagnetic. paramagnetic and helimagnetic (q+ 0) phases.
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