Magnetization and magnetic entropy of ZrZn2

“…The jump in the specific heat at T c is measured to be 1500 mJ (mol KZ)-1 against a calculated value of ACT = 2290 from the SWE model (Brodsky and Trainor 1977). This agreement is not bad when un--- 2o t I I certainties in the magnetic properties are taken into consideration, and the agreement is as good as for ZrZnz (Clinton and Viswanathan 1975).…”

Section: 31mentioning

confidence: 51%

Magnetic properties of the actinide elements and their metallic compounds

Brodsky

1978

Rep. Prog. Phys.

143

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A review is given of the magnetic properties of metallic actinides, and of the relationship between their properties and their electronic structures. It is shown that the 5f electrons of light actinides often form into bands, rather than exist as localised electrons as is usually the case for the 4f electrons of metallic rare earths. The 5f bands form due to 5f-5f wavefunction overlap or to hybridisation with s, p or d electrons. As a result of the band formation, a wide variety of magnetic phenomena may occur. These range from non-magnetic transition-metal behaviour, to spin fluctuations and itinerant magnetism, as well as localised 5f electron magnetism.Whereas the non-self-consistent properties of the pure metals are difficult to understand, a number of actinide alloys and intermetallic compounds have properties which are representative of well-characterised types of magnetic behaviour. These are most useful in explaining the behaviour of other systems by extrapolation.Speoial properties of the actinides are discussed which have limited quantitative understanding of actinide magnetism. Corresponding theoretical difficulties are discussed also. Emphasis is given to the properties of simple compounds as their systematic study has aided in the development of useful relationships to theoretical ideas.

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“…An anomaly at the transition was also missing in C p (T) measurements [85], which followed the FL form C p = γT + βT 3 , with γT the electronic contribution and βT 3 the phonon contrib ution. Estimates of C m /T for ZrZn 2 led to the determination of a small magnetic entropy S m ∼ 3% of R ln 2 at T C , which disagreed with the prediction of zero entropy from the Stoner model [79]. Despite such shortcomings, the band structure of ZrZn 2 displayed a sharp peak in the ρ(E F ) which could be responsible for the enhancement of χ on the basis of the Stoner criterion [86].…”

Section: Quantum Criticality and Departure From Fl Behavior: Hertz-mi...mentioning

confidence: 82%

“…The first measurements on polycrystalline ZrZn 2 revealed a linear χ −1 (T) above T C [75], as well as a very small µ sat ≈ 0.15 µ B f.u. −1 , as indicated by M(H) measurements [76][77][78][79][80]. The mean-field approach used by Arrott to plot M 2 versus H/M yielded a set of parallel, linear isotherms that accurately captured the transition and spontaneous magnetization [81].…”

Section: Quantum Criticality and Departure From Fl Behavior: Hertz-mi...mentioning

confidence: 99%

Itinerant magnetic metals

Huang²,

Morosan

2017

J. Phys.: Condens. Matter

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In this review, an overview of itinerant magnets without magnetic elements is presented, beginning with a comparison of the local and itinerant moment pictures, the two extremes of magnetism. Then, the theoretical developments leading up to the self-consistent renormalization theory of spin fluctuations will be discussed, followed by an introduction to quantum criticality and the experimental signatures associated with systems near a quantum critical point. Three itinerant magnets without magnetic elements, ZrZn, ScIn, and TiAu are the focus of this review, as their empty d shells set them apart in their purely itinerant character, while several enhanced Pauli paramagnets and intermediate moment magnets are also discussed to put the overall comparison into perspective.

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Magnetization and magnetic entropy of ZrZn2

Cited by 12 publications

References 13 publications

Band magnetism due to f-electrons

Band magnetism due to f-electrons

Magnetic properties of the actinide elements and their metallic compounds

Itinerant magnetic metals

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