What can we learn about critical magnetic phenomena from muon spin rotation experiments?

Herlach, D.; Fürderer, K.; Fähnle, M.; Schimmele, L.

doi:10.1007/bf02401571

Cited by 16 publications

(3 citation statements)

References 34 publications

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“…The relaxation rate therefore is mainly determined by dynamic local spin fluctuations caused by the onset of spontaneous magnetization. This is a well-known behaviour from Γ measurements in the paramagnetic regime of solid ferromagnetic materials like Fe or Co, where 20 K above T C (s), Γ is of the same magnitude [10].…”

mentioning

confidence: 52%

Magnetic ordering in a supercooled Co-Pd melt studied by muon-spin rotation

et al. 1998

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Liquid samples of Co80Pd20 were cooled below their liquidus temperature T l and supercooled towards the paramagnetic-ferromagnetic transition temperature TC(l) by means of the Electromagnetic Levitation (EML) technique. Muon-Spin Rotation (µSR) measurements were used to determine the spin precession frequency f and the transverse muon-spin relaxation rate Γ in the liquid supercooled sample at temperatures T > TC(l). Γ increases by a factor of 5 when T approaches TC(l), indicating large spin fluctuations caused by the onset of spontaneous magnetization. The temperature dependence of the inverse frequency shift ∆f −1 reflects a Curie-Weiss behaviour of the paramagnetic susceptibility. The experiments strongly suggest the existence of ferromagnetic ordering in a liquid metal.

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confidence: 52%

Magnetic ordering in a supercooled Co-Pd melt studied by muon-spin rotation

et al. 1998

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“…According to a model used for the analysis (Herlach et al . 1986), the change in the frequency of the muon-spin precession, ∆f = ∆f (T ) − f ext ∝ χ(T )B ext , is proportional to the paramagnetic susceptibility, χ(T ).…”

Section: (A) Experimental Results On Undercooling and Magnetic Ordering In The Undercooled Liquidmentioning

confidence: 99%

“…1995). The levitation apparatus, together with the coils, was placed into a muon-spin rotation (µ-SR) measuring area of the Paul Scherrer Institut, in Villigen, Switzerland (Herlach et al . 1986).…”

Section: Methodsmentioning

confidence: 99%

Magnetic ordering and crystal nucleation in undercooled Co–based melts

Herlach¹,

Holland‐Moritz²,

Willnecker³

et al. 2003

Philosophical Transactions of the Royal Society of London. Seri

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Long-range magnetic order in metals and alloys is restricted to the solid state of matter, since the Curie temperatures of all known metallic materials are below their respective melting temperatures. This article reviews recent investigations on the maximum undercoolability of Co-based alloys, which show high relative Curie temperatures. Experiments on drops undercooled containerlessly by electromagnetic levitation show the onset of magnetic ordering when the temperature is approaching the Curie temperature. Studies of the nucleation behaviour propose a magnetic contribution to the activation energy to form crystal nuclei of critical size in deeply undercooled Co-rich melts.

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μ+ spin relaxation in ferromagnets

Réotier

Yaouanc

1994

Hyperfine Interact

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What can we learn about critical magnetic phenomena from muon spin rotation experiments?

Cited by 16 publications

References 34 publications

Magnetic ordering in a supercooled Co-Pd melt studied by muon-spin rotation

Magnetic ordering in a supercooled Co-Pd melt studied by muon-spin rotation

Magnetic ordering and crystal nucleation in undercooled Co–based melts

μ+ spin relaxation in ferromagnets

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