Journal ArticleDOI
Pressure induced crossover of the magnetic transition from second to first order near the quantum critical point in MnSi
TLDR
The magnetic ordering transition temperature in MnSi decreases with increasing pressure and tends towards absolute zero near 15 kbar as discussed by the authors. But as the critical pressure is approached, the crossover point is found to be near a minimum in the inverse susceptibility as a function of temperature.Abstract:
The magnetic ordering transition temperature in MnSi decreases with increasing pressure and tends towards absolute zero near 15 kbar. As the critical pressure is approached, we observe a crossover from a conventional transition of second order to one of weak first order. The crossover point is found to be near a minimum in the inverse susceptibility as a function of temperature. A qualitative description of this behaviour is given in terms of a temperature dependent renormalisation of the coefficients in a sixth order Landau expansion for the free energy.read more
Citations
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Quantum phase transitions
TL;DR: A review of quantum phase transitions in condensed matter physics can be found in this article, where the authors introduce important concepts of phase transitions and discuss the interplay of quantum and classical fluctuations near criticality.
Journal ArticleDOI
Singular or Non-Fermi Liquids
TL;DR: An introductory survey of the theoretical ideas and calculations and experimental results which depart from Landau Fermi liquids is presented in this paper, where the common themes and possible routes to the singularities leading to breakdown of Landau fermi liquid are categorized.
Journal ArticleDOI
Non-Fermi-liquid behaviour in the heavy-fermion system
TL;DR: In this paper, it is suggested that low-energy spin excitations are at the origin of these non-Fermi liquid (NFL) anomalies which occur at a zero-temperature quantum phase transition.
Journal ArticleDOI
Singular Fermi Liquids
TL;DR: A survey of the theoretical ideas and calculations and the experimental results which depart from Landau Fermi-liquids is presented in this article, followed by a discussion of Singular Fermis liquids in a wide variety of experimental situations and theoretical models.
Journal ArticleDOI
Magnetic small-angle neutron scattering
Sebastian Mühlbauer,Dirk Honecker,Elio Alberto Perigo,Frank Bergner,Sabrina Disch,A. Heinemann,Sergey Erokhin,Dmitry Berkov,Chris Leighton,Morten Eskildsen,Andreas Michels +10 more
TL;DR: In this article, the authors presented the results of a project for the U.S. Department of Energy, Office of Basic Energy Sciences, under Award No. DE-SC0005051 and DE-FG02-06ER46275.
References
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Journal ArticleDOI
Metamagnetic transition and susceptibility maximum in an itinerant-electron system.
TL;DR: The present theory can explain qualitatively these anomalous magnetic properties observed in Co compounds Co(S,Se,Se${)}_{2}$, ${\mathrm{YCo}}_{2}, ${\ mathrm{LuCo}$, and others.
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Paramagnetic spin fluctuations in the weak itinerant-electron ferromagnet MnSi
TL;DR: The origin of the increase in the amplitude of the local magnetic moment above T/sub c/ is attributed to the thermal excitations of the high-energy spin fluctuations in the Stoner continuum.
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The high field-high pressure magnetic properties of MnSi
TL;DR: Experiments at high pressures and magnetic fields indicate that although MnSi is an unsaturated ferromagnet it cannot be characterized as a simple weak itinerant one as mentioned in this paper, and therefore it is difficult to characterize it as a weak ferromagnetic magnet.
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Band structure and magnetic fluctuations in ferromagnetic or nearly ferromagnetic metals
TL;DR: In this paper, a detailed analysis of the roles of independent particle excitations and enhanced magnetic fluctuations is presented, in terms of empirically determined microscopic parameters only, a good quantitative description of the low temperature magnetic equation of state in Ni3Al is given.
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Perspective on heavy-electron and kondo-lattice systems from high-pressure studies
TL;DR: The application of modest pressures p to rare-earth and actinide-based heavy-electron / Kondo-lattice materials produces significant changes in both their temperature dependent electrical resistivity ϱ and electronic specific heat γ as discussed by the authors.