Научная новизна заключена в исследо

Научная новизна заключена в исследовании магнитокалорического эффекта (в том числе и связанных с ним магнитных, структурных, тепловых свойств) в различных материалах в сильных переменных магнитных полях. Исследования магнитных свойств материалов в переменных магнитных полях большой интенсивности до сих пор не проводились, так как не было прикладной необходимости в таких исследованиях. Для исследования магнитокалорических свойств материалов будут применяться как новые методы, разработанные специально для случая переменных магнитных полей, так и традиционные методы исследования, такие как измерение намагниченности, МКЭ, теплоемкости, некоторых структурных свойств (тепловое расширение, магнитострикция) в постоянных магнитных полях. Исследования разных параметров будут проводиться на одних и тех же образцах изучаемого материала, что исключает влияние разброса свойств материалов от образца к образцу. В рамках данного проекта предполагается создание новых источников переменного магнитного поля, необходимых для выполнения проекта, а также разработка методов исследования магнитных свойств материалов в переменных магнитных полях, в дополнение к уже разработанным российскими авторами проекта методам измерения МКЭ и магнитострикции в переменных магнитных полях. Будут использоваться сильные переменные магнитные поля (до 80 кЭ) и частотой до 50 Гц.

Основными объектами исследований будут магнитокалорические материалы с магнитоструктурными фазовыми переходами, в которых наблюдается гигантский МКЭ, в частности, сплавы Гейслера Ni-Mn-X (X=In, Sb, Sn...), сплавы Gd5(Si-Ge)4, La(FeSi)13H, материалы, в которых магнитные фазовые переходы сопровождаются резкими изменениями объема без изменения структуры (сплавы FeRh, Mn(Fe,P)As, различные составы манганитов, в частности Sm1-xSrxMnO3).

Результаты (английский) 1:

The scientific novelty of the research lies in the magnitokaloričeskogo effect (including related magnetic, structural, thermal properties) in a variety of materials in the strong variable magnetic fields. Study of magnetic properties of materials in a variable high-intensity magnetic fields so far have not been carried out, since there was no application of the need for such studies. For research magnitokaloričeskih properties of materials will be applied as new methods, designed specifically for the case of variable magnetic fields and traditional research methods, such as measurement of magnetization, MEE, heat, some structural properties (thermal expansion, magnetostriction) in permanent magnetic fields. Study of different parameters will be conducted on the same samples of studied material, which excludes the effect of variation of material properties from sample to sample. In this project it is planned to create new sources of alternating magnetic field required to complete the project, as well as the development of methods for the study of magnetic properties of materials in variable magnetic fields, in addition to the already established Russian sponsors measurement MEE and magnetostriction in variable magnetic fields. Will use strong variable magnetic fields (up to 80 EC) and frequency to 50 Hz. The main objects of research are magnitokaloričeskie materials with magnitostrukturnymi phase transitions, in which there is a giant MEE, in particular, Geissler alloys of Ni-Mn-X (X = In, Sn, Sb, ...), alloys Gd5 (Si-Ge) 4, La (FeSi) 13 h, material in which the magnetic phase transitions accompanied by sudden changes in volume without changing the structure (FeRh alloys, Mn (Fe, P) As, different formulations of manganites, in particular Sm1-xSrxMnO3).

Результаты (английский) 2:

Scientific novelty lies in the study of magnetocaloric effect (including the associated magnetic, structural, thermal properties) in different materials in strong alternating magnetic fields. Studies of the magnetic properties of materials in alternating magnetic fields of high intensity is still not carried out, as there was no need for the application of such research. To study the magnetocaloric properties of materials will be used as new techniques developed specifically for the case of variable magnetic fields and traditional research methods such as measurement of the magnetization, FEM, heat capacity, some structural properties (thermal expansion, magnetostriction) in constant magnetic fields. Investigations of different parameters will be conducted on the same samples of the studied material, which eliminates the influence of scattering properties of materials from sample to sample. The project is expected to create new sources of variable magnetic field required for the project, as well as the development of methods for the study of magnetic properties of materials in alternating magnetic fields, in addition to the software developed by the authors of the project measurement methods FEM and magnetostriction in alternating magnetic fields. Will use a strong alternating magnetic field (up to 80 kOe) and a frequency of 50 Hz. The main objects of the research will be magnetocaloric materials magnetostructural phase transitions in which there is a giant MCE, in particular, Heusler alloys Ni-Mn-X (X = In, Sb , ... Sn), alloys Gd5 (Si-Ge) 4, La (FeSi) 13H, materials in which the magnetic phase transitions are accompanied by sharp changes in volume without changing the structure (alloys FeRh, Mn (Fe, P) As, various formulations manganite, in particular Sm1-xSrxMnO3).

Результаты (английский) 3:

the novelty is in the study магнитокалорического effect (including the related magnetic, structural and thermal properties in different materials in strong variable magnetic fields.study of magnetic properties of the materials in a variable magnetic field intensity is still not carried out, so as not to be applied in such studies.to study the магнитокалорических material properties will be used as new techniques designed specifically for the case of variable magnetic fields, and the traditional research methods.such as the measurement of намагниченности, fea, some structural properties (specific heat, thermal expansion and magnetostriction) in constant magnetic fields.study of different parameters will be carried out on the same samples of study material that eliminates the influence of dispersion of material properties from sample to sample.the project is expected to create new sources of alternating magnetic field necessary for the implementation of the projectas well as the development of methods to study magnetic properties of materials in variable magnetic fields.in addition to the already developed by the authors of the draft in measuring the fea and магнитострикции in variable magnetic fields. variables will be strong magnetic fields (up to 80 ke) and a frequency of 50 hz.

the main objects of study are магнитокалорические materials with магнитоструктурными фазовыми passages, in which there is a fea, in particular, the alloys гейслера ni - mn - x (x = as, sb, sn) alloys Gd5 (si, ge) 4.la (FeSi) 13h, materials in which the magnetic phase transitions are accompanied by sharp changes in the level of without changing the structure of alloys FeRh, mn (fe, p) as манганитов, various formulations, in particular Sm1 - xSrxMnO3).