Geodesic
Study of fine peculiarities of heat capacity in $\mathrm{YBa_2Cu_3O_y}$ films by means of the laser-coupled flat-coil-oscillator
Proceedings of the Yerevan State University. Physical and mathematical sciences, no. 1 (2011), pp. 49-54

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Improvements in the "hybrid” imaging method, based on traditional Laser Scanning Microscopy in combination with the single-layer flat-coil-oscillator (SFCO) sensitive technique introduced by authors earlier, are discussed. This method is capable of imaging $\mathrm{2D}$-grained structure, as well as the normal-tosuperconductive phase transition in flat thin high-$T_c$ superconductive materials with $1–2 \mu m$ spatial resolution. It enabled to detect weakly expressed peculiarities of the heat capacity in $\mathrm{YBa_2Cu_3O_y}$ film (preceding the well-known specific heat "jump”), which are important for true understanding of the real nature of superconductivity phenomenon. The method uses a well-focused $\mathrm{He-Ne}$ laser beam as a probing signal, and the SFCO-technique as a high-resolution sensing tool.
Keywords: Cryogenic laser scanning microscope (CLSM), heat capacity of $\mathrm{YBa_2Cu_3O_y}$ film, high-$T_c$ superconductive (HTS) $\&$ low-$T_c$ superconductive (LTS) materials, normal-to-superconductive (N/S) phase transition, single-layer flat-coil-oscillator test-method (SFCO-technique).
Mots-clés : imaging technique 
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     title = {Study of fine peculiarities of heat capacity in  $\mathrm{YBa_2Cu_3O_y}$ films by means of the laser-coupled flat-coil-oscillator},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {49--54},
     publisher = {mathdoc},
     number = {1},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UZERU_2011_1_a8/}
}
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S. G. Gevorgyan; G. H. Karapetyan; H. G. Shirinyan; S. T. Muradyan; G. S. Gevorgyan; B. K. Kurghinyan; V. S. Gevorgyan; A. A. Polyanskii. Study of fine peculiarities of heat capacity in  $\mathrm{YBa_2Cu_3O_y}$ films by means of the laser-coupled flat-coil-oscillator. Proceedings of the Yerevan State University. Physical and mathematical sciences, no. 1 (2011), pp. 49-54. http://geodesic.mathdoc.fr/item/UZERU_2011_1_a8/