A study is made of the surface corrugation during thermal cycling of ferromagnetic shape memory alloys (FSMA). This specific feature is a property of FSMA alloys and is a consequence of martensitic phase transformations not necessarily connected with surface defects of the material. The surface relief structure was studied together with martensite and magnetic domain structure changes during thermal cycling of the samples with the aid of differential polarized light microscopy. The analysis was facilitated making use of auxiliary reference grids applied to the surface of the samples.

A new method of imaging of temperature distributions is presented. The method is based on the use of a BiLu2Fe4GaO12 ferrimagnetic garnet layer as a pyro-magneto-optical detection layer. Thermal imaging with high sensitivity, with micrometer spatial and with millisecond temporal resolution is demonstrated in a contactless read-out scheme.

Experimental research into the possibilities of visualizing the distribution of magnetic stray fields near the surface of uniaxial highly anisotropic magnets and working fields of permanent thin-film magnets for microelectromechanical systems is performed. The possibility of visualizing the magnetic-field distribution near the basal and prismatic planes of uniaxial crystals caused by 180-degree-type domain structure is demonstrated. A method of the segmentation of magnetic contrast by removing the topographic component from the full image using a movable metallic screen is proposed.

A study is made of the reflectance anisotropy of martensitic and magnetic domains in ferromagnetic shape memory alloys (FSMA) Ni-Mn-Ga and Co-Ni-Ga. The reflectance of metallographic sections of these alloys was measured in the visible with the aid of standard inverted polarized light microscope with a 360° rotatable specimen stage. Calculations are presented for the estimation of image contrast values between neighboring martensite twins. Qualitative and quantitative observations and angular measurements in reflected polarized light proved to be useful for the analysis of specific features of the martensite microstructure of multiferroic materials.

A study is made of spatial and temporal temperature variations in working devices based on ferroic functional materials. The measurement of the sample's temperature is complemented with direct observation of its distribution over the sample surface. For the latter purpose a thermovision infrared videocamera technique was employed. Specific features of the temperature distribution and its evolution during heating and cooling of a number of piezoelectric, acoustooptic and shape memory components are revealed. Examples of hot spot observations indicative of structural defects in the samples under study are given thus suggesting the use of thermal vision for nondestructive testing. A proposal is made to combine the thermovision method with that of thermomagnetic analysis for the study of ferromagnetic shape memory alloys.

Предложен метод синтеза согласующих цепей пьезопреобразователей для акустооптических устройств. Алгоритмы расчета согласующих LC элементов основаны на учёте физических особенностей диаграммы полных импедансов и проводимостей Смита без применения стандартных методов теории фильтров СВЧ. Осуществлена компьютерная симуляция работы векторных анализаторов цепей. Метод позволяет легко предсказать влияние на граничные частоты диапазона согласования подключения новых дополнительных реактивных элементов. Достоинством предложенного феноменологического подхода является его наглядность и пригодность для практического осуществления.