منابع مشابه
Critical Exponents of Erbium
The exponent P that describes the sinusoidally modulate d * paramagnetic phase transition crosses over from a value of 0.39 near TN to a mean field value away from TN. Electrical resistivity measurements near TN are given for the c axis and the critical behaviour is discussed. Erbium orders below its NBel temperature TN= 85 K with its spins directed along the c axis of the hcp crystal and with ...
متن کاملSurface Self-diffusion of Erbium
The activation energy for the surface self-diffusion of epitaxial erbium crystals grown on a tungsten field emitter tip has been examined. It was found to be strongly dependent both on the crystallographic orientation of the tip and the direction of electric field applied. The values of the activation energy, calculated from Arrhenius-type plots, and also field emission patterns of epitaxial Er...
متن کاملBose-Einstein condensation of erbium.
We report on the achievement of Bose-Einstein condensation of erbium atoms and on the observation of magnetic Feshbach resonances at low magnetic fields. By means of evaporative cooling in an optical dipole trap, we produce pure condensates of 168Er, containing up to 7×10(4) atoms. Feshbach spectroscopy reveals an extraordinary rich loss spectrum with six loss resonances already in a narrow mag...
متن کامل/Erbium Laser Safety
background. There are a variety of potential hazards with laser technology. methods. A review of the literature. objective. To summarize the potential hazards of CO 2 and erbium laser technologies and the safety guidelines and equipment developed to minimize them. results. Laser hazards can be divided into the following categories: mechanical, environmental, macrobiologic, microbiologic, and ia...
متن کاملSynoviorthesis with erbium-169: a double-blind controlled comparison of erbium-169 with corticosteroid.
Intra-articular injections of erbium--169 citrate and methylprednisolone acetate in hand joints were compared in a randomly selected double-blind trial. The patients included 21 with rheumatoid arthritis and 3 with psoriatic arthritis, and the design was an intrapatient comparison. No difference between joints treated with the radioisotope or steroid was observed in the year following injection.
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1998
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.81.4652