Features of Structural, Energy and Kinetic Characteristics of Hf_1-xEr_xNiSn Solid Solution

• Main Authors: L. P. Romaka, Yu. V. Stadnyk, V. V. Romaka, V. Ya. Krayovskyy, P.-F. Rogl, A. M. Нoryn
• Format: Article
• Language: English
• Published: Vasyl Stefanyk Precarpathian National University 2017-09-01
• Series: Фізика і хімія твердого тіла
• Online Access: http://journals.pu.if.ua/index.php/pcss/article/view/1242
• ISSN: 1729-4428; 2309-8589

<p>The features of structural, energy state and electrokinetic characteristics were investigated for Hf&lt;sub&gt;1-x&lt;/sub&gt;Er&lt;sub&gt;x&lt;/sub&gt;NiSn solid solution in the range: T = 80 – 400 K, x = 0 - 0.10. It was confirmed partly disorder crystal structure of HfNiSn compound as a result of occupation in the 4a crystallographic site of Hf (5d&lt;sup&gt;2&lt;/sup&gt;6s&lt;sup&gt;2&lt;/sup&gt;) atoms by Ni (3d&lt;sup&gt;8&lt;/sup&gt;4s&lt;sup&gt;2&lt;/sup&gt;) ones up to ~ 1 % that generates in the crystal structural defects of donor nature. It was shown that introduction of Er atoms ordered crystal structure (“healing” of structural defects). It was established mechanisms of simultaneous generation of structural defects as acceptors by substitution of Hf (5d&lt;sup&gt;2&lt;/sup&gt;6s&lt;sup&gt;2&lt;/sup&gt;) by Er (4f&lt;sup&gt;12&lt;/sup&gt;5d&lt;sup&gt;0&lt;/sup&gt;6s&lt;sup&gt;2&lt;/sup&gt;) atoms, and the donor nature defects as a result of the appearance of vacancies in the Sn (4b) atoms sites, which determines the mechanisms of conductivity for Hf&lt;sub&gt;1-x&lt;/sub&gt;Er&lt;sub&gt;x&lt;/sub&gt;NiSn.</p><p><strong>Keywords:</strong> crystal and electronic structures, conductivity, thermopower coefficient.</p>