Pressure-Induced Valence Crossover and Novel Metamagnetic Behavior near the Antiferromagnetic Quantum Phase Transition of YbNi3Ga9

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  • Pressure-Induced Valence Crossover and Novel Metamagnetic Behavior near the Antiferromagnetic Quantum Phase Transition of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>YbNi</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>Ga</mml:mi><mml:mn>9</mml:mn></mml:msub></mml:math>
Published
2015-02-24
Resource Type
journal article
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  • Copyright (c) 2015 American Physical Society
DOI
  • 10.1103/physrevlett.114.086401
  • 10.48550/arxiv.1501.06973
Publisher
American Physical Society

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We report electrical resistivity, ac magnetic susceptibility, and x-ray absorption spectroscopy measurements of intermediate valence YbNi3Ga9 under pressure and magnetic field. We have revealed a characteristic pressure-induced Yb valence crossover within the temperature-pressure phase diagram, and a first-order metamagnetic transition is found below Pc ∼ 9 GPa where the system undergoes a pressure-induced antiferromagnetic transition. As a possible origin of the metamagnetic behavior, a critical valence fluctuation emerging near the critical point of the first-order valence transition is discussed on the basis of the temperature-field-pressure phase diagram.

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