Field electron emission microscopy and spectroscopy of YBa2Cu3O6.9 single crystals at different temperatures
โ Scribed by S.I. Shkuratov; S.N. Ivanov; S.N. Shilimanov
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 459 KB
- Volume
- 213
- Category
- Article
- ISSN
- 0921-4534
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We have determmed the magnetic field dependence of the electron density of states at the Fermi level, NF(H), by specific heat measurements on single-crystal YBCO. The total specific heat includes contribunons from phonons and impurities, as well as the electronic specific heat. The electronic specif
The anisotropy of the first critical field Hcl is found to increase from H/c/~(0)/H~I(0)=4 to I0 on going to x=0.93 llc to. x=0.64 . For x=0.93, Hcl(0)=(950-+200)Oe, Hc1~( 0)=(230+20)Oe. For x=0.64, H/~(0)=(270-+30)Oe, .LC + Hc1(0)=(27-2)Oe. An anomalous linear T-dependence was found for H//c at low