Magnetic excitations in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ni</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>Al at low energies and long wavelengths

Bernhoeft, N.; Lonzarich, G. G.; Mitchell, P.W.; Paul, D. Mc K.

doi:10.1103/physrevb.28.422

Cited by 67 publications

(19 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More comprehensive models were developed in the 1970s by Moriya and collaborators (Moriya, 1985) in the spinfluctuation-theory work already mentioned above. As inelastic neutron scattering became feasible, which demonstrated the existence of magnetic fluctuations and allowed for their quantitative parameterization (Bernhoeft et al, 1983;Ishikawa et al, 1982), it became possible to accurately model key material properties such as T C , the low-temperature ordered moment and its temperature dependence, as well as the temperature dependence of the magnetic susceptibility and the associated fluctuating moment, in a further development of the SCR spinfluctuation approach (Lonzarich and Taillefer, 1985).…”

Section: B Quantum Ferromagnetic Transitions In Metalsmentioning

confidence: 99%

Metallic quantum ferromagnets

et al. 2016

View full text Add to dashboard Cite

We give an overview of quantum phase transitions (QPTs) in metallic ferromagnets, discussing both experimental and theoretical aspects. These QPTs can be classified with respect to the presence and strength of quenched disorder: Clean systems generically show a discontinuous, or first-order, QPT from a ferromagnetic to a paramagnetic state as a function of some control parameter, as predicted by theory. Disordered systems are much more complicated, depending on the disorder strength and the distance from the QPT. In many disordered materials the QPT is continuous, or second order, and Griffiths-phase effects coexist with QPT singularities near the transition. In other systems the transition from the ferromagnetic state at low temperatures is to a different type of long-range order, such as an antiferromagnetic or a spin-density-wave state. In still other materials a transition to a state with glass-like spin dynamics is suspected. The review provides a comprehensive discussion of the current understanding of these various transitions, and of the relation between experiment and theory.

show abstract

Section: B Quantum Ferromagnetic Transitions In Metalsmentioning

confidence: 99%

Metallic quantum ferromagnets

et al. 2016

View full text Add to dashboard Cite

show abstract

“…As a reference system for the study of the border of metallic ferromagnetism, Ni 3 Al is also convenient because, along with its close relative, the nearly ferromagnetic metal Ni 3 Ga, it has been extensively studied using a wide range of experimental techniques, 23,24,25,26,27,28,29,30,31,32 all of which indicate the importance of spin fluctuations in these materials. 33,34 The combined results in these two systems define the parameters of the mean-field spin-fluctuation model that may be relevant to interpreting the behaviour of Ni 3 Al from its low-pressure ferromagnetic phase to the high pressure paramagnetic phase near and above p c where a marginal Fermi liquid cross-over state may be expected to be observed.…”

Section: 23mentioning

confidence: 99%

Spin-fluctuation-dominated electrical transport ofNi3Alat high pressure

et al. 2005

Self Cite

View full text Add to dashboard Cite

We present the first study of a magnetic quantum phase transition in the itinerant-electron ferromagnet Ni3Al at high pressures. Electrical resistivity measurements in a diamond anvil cell at hydrostatic pressures up to 100 kbar and temperatures as low as 50 mK indicate that the Curie temperature collapses towards absolute zero at a critical pressure pc = 82±2 kbar. Over wide ranges in pressure and temperature, both in the ferromagnetic and paramagnetic states, the temperature variation of the resistivity is found to deviate from the conventional Fermi-liquid form. We consider the extent to which this deviation can be understood in terms of a mean-field model of enhanced spin fluctuations on the border of ferromagnetism in three dimensions.

show abstract

“…High purity single crystals of UPt3 were prepared in an ultrahigh vacuum by zone-refining a rod of the compound, contamed m a watercooled copper crucible, with radio frequency heating Our purification procedure, previously used for transition metal lntermetalhc compounds [9][10][11], yielded bulk single crystals with residual resistivity ratios (extrapolated to absolute zero from the temperature interval of 1 2 to 10 K) In excess of 400 Low strain samples, 0 5 mm thick and 3 0 mm in diameter, were cut from the purest parts of the ingots by means of spark erosion followed by chemical etching…”

Section: Details Of the Experimentsmentioning

confidence: 99%

Direct observation of heavy quasiparticles in UPt 3 via the dHvA effect

Taillefer

Newbury

Lonzarich

et al. 1987

Journal of Magnetism and Magnetic Materials

187

View full text Add to dashboard Cite

We present the results of an investigation of the de Haas-van Alphen (dHvA) effect m the heavy ferm~on superconductor UPt~Oscdlations composed of up to 8 frequency components corresponding to cyclotron orbits in a plane normal to the a-axis, have been detected in a high purity single crystal and a study of their amphtude as a function of temperature and magnetic field has been performed m the intervals 20-150 mK and 40-115 kG, respectively From this study we obtam estimates of the cyclotron masses, found to range approximately from 25 to 90 times the bare electron mass, and of the mean free path, found to be m excess of 1000 ,& The relationship between these findings and the results of conventional energy band calculations is &scussed

show abstract

Magnetic excitations inNi3Al at low energies and long wavelengths

Cited by 67 publications

References 8 publications

Metallic quantum ferromagnets

Metallic quantum ferromagnets

Spin-fluctuation-dominated electrical transport ofNi3Alat high pressure

Direct observation of heavy quasiparticles in UPt 3 via the dHvA effect

Contact Info

Product

Resources

About