В рамках этих общих проблем будут р

В рамках этих общих проблем будут решаться следующие конкретные экспериментальные и теоретические задачи:
Экспериментальные задачи:
1. Установление основных особенностей поведения магнитокалорических свойств различных материалов в переменных магнитных полях.
2. Установление природы гигантского МКЭ в материалах с фазовыми переходами первого рода.
3. Установление температурных, полевых и частотных интервалов наблюдения обратимого МКЭ в переменных магнитных полях в различных материалах с гигантским МКЭ
4. Исследование кинетики релаксационных явлений в магнитных материалах и их связи с магнитными и магнитокалорическими свойствами, установление характерных времен релаксации магнитной и решеточной подсистем
5. Изучение влияния долговременного действия переменного магнитного поля на магнитные и магнитокалорические свойства материалов, с целью установления природы возможного деградирующего действия AC поля на магнитные и структурные свойства
6. Поиск перспективных магнитокалорических материалов с точки зрения их поведения в переменных магнитных полях (гигантский МКЭ, широкая температурная область наблюдения МКЭ вблизи комнатных температур, физическая и механическая устойчивость, и т.д.)

Теоретические задачи:
1. В рамках ренормгруппового подхода будет исследована температурная зависимость намагниченности магнитного материала с параметром порядка, зависящим от магнитострикции, а также будут проведены оценки МКЭ при различных значениях параметров задачи.
2. В рамках теории фазовых переходов Ландау будет проведено исследование влияния переменного магнитного поля на магнитные фазовые переходы, в частности на магнитокалорический эффект.
3. Исследование магнон-фононного взаимодействия и процессов распада: распад магнона на магнон, распад магнона на фонон в материалах с большой магнитострикцией.
4. Исследование релаксации магнитных моментов и выравнивания магнонной и фононной температур в материалах с большой магнитострикцией.
5. Оценка динамики структурного и магнитного переходов в различных материалах

Результаты (английский) 1:

Within these common problems are addressed the following specific experimental and theoretical objectives:Experimental tasks:1. Establishment of basic behavioral magnitokaloričeskih properties of various materials in the variable magnetic fields.2. the establishment of a nature gigantic MEE in materials with phase transitions of the first kind. 3. setting temperature, field and frequency monitoring intervals reversible MEE in variable magnetic fields in different materials with gigantic MEE4. Study of the kinetics of relaxation phenomena in magnetic materials and their relation with magnetic and magnitokaloričeskimi properties to establish the characteristic relaxation times of magnetic and lattice subsystems5. to examine the effects of long-term actions of alternating magnetic field on magnetic and magnitokaloričeskie properties of materials, in order to establish the nature of the possible actions of a degrading AC field on magnetic and structural properties6. the search for prospective magnitokaloričeskih materials in terms of their behaviour in a variable magnetic fields (giant MEE, wide temperature range monitoring MEE near room temperature, physical and mechanical resistance, etc.)Theoretical problems:1. Within the framework of the renormgruppovogo approach will be investigated the temperature dependence of magnetization of magnetic material with the option to order depending on the magnetostriction and estimations of FEM with different values of the parameters of the task.2. Within the framework of the theory of phase transitions, Landau will study the influence of alternating magnetic field on magnetic phase transitions, in particular the magnitokaloričeskij effect.3. Study-Phonon interaction and Magnon processes of decay: decay, disintegration of the Magnon on Magnon Magnon on Phonon in materials with large magnetostriction.4. Study of the magnetic moments of relaxation and Phonon and magnonnoj temperature alignment in materials with large magnetostriction. 5. assessment of the dynamics of structural and magnetic transitions in different materials

Результаты (английский) 2:

Within the framework of these common problems will be addressed the following specific experimental and theoretical problem:
experimental tasks:
1. Establishment of the main features of the behavior of magnetocaloric properties of different materials in alternating magnetic fields.
2. The establishment of nature giant MCE in materials with phase transitions of the first kind.
3. Determination of temperature, field and frequency intervals surveillance reversible FEM in alternating magnetic fields in different materials with a giant MCE
4. Investigation of the kinetics of relaxation phenomena in magnetic materials and their relation to magnetic and magnetocaloric properties, setting the characteristic relaxation time of the magnetic and lattice subsystems
5. The study of the effect of long-term action of the alternating magnetic field on the magnetic and magnetocaloric properties of materials in order to establish the nature of the possible AC degrading action of the field on the magnetic and structural properties
6. Search advanced magnetocaloric materials in terms of their behavior in alternating magnetic fields (FEM giant, wide temperature range surveillance FEM near room temperature, physical and mechanical resistance, etc.) Theoretical tasks: 1. In the renormalization group approach is the temperature dependence of the magnetization of the magnetic material with an order parameter that depends on the magnetostriction, and will be conducted to evaluate the FEM at different values ​​of the parameters of the problem. 2. Within the framework of the Landau theory of phase transitions will be investigated the influence of an alternating magnetic field to the magnetic phase transitions, in particular on the magnetocaloric effect. 3. Research magnon-phonon interaction and decay processes: the disintegration of the magnon-magnon, phonon on the magnon decay in materials with high magnetostriction. 4. The study of the magnetic moments of relaxation and leveling the magnon and phonon temperature in materials with high magnetostriction. 5. Assessment of the dynamics of the structural and magnetic transitions in various materials

Результаты (английский) 3:

the common problems are addressed by the following specific experimental and theoretical challenges:
experimental tasks:
1.the main characteristics of the behaviour of different materials in магнитокалорических variable magnetic fields.
2. the nature of the fea in materials with фазовыми passages of the first kind.
3. the temperature field and the frequency intervals of observation обратимого fea in the variable magnetic fields in various materials with giant fea
4.study on the kinetics of relaxation phenomena in magnetic materials and their connection with the magnetic and магнитокалорическими properties, the characteristic relaxation times, magnetic and решеточной subsystems
5.study on the impact of long-term operation of ac magnetic field on the magnetic properties and магнитокалорические materialsto determine the nature of the possible деградирующего of ac field on the magnetic and structural properties of
6.searching for promising магнитокалорических materials in terms of their behaviour in the variable magnetic fields (giant fea, the temperature field fea near room temperature observation.the physical and mechanical durability, etc.)

theoretical challenges:
1. in the ренормгруппового approach will be investigated temperature dependence of намагниченности magnetic material with the orderdependent on the магнитострикции and assessments will be carried out with different values of parameters of fea tasks.
2.in the theory of phase transitions will be a study of the influence of landau's alternating magnetic field on the magnetic phase transitions, in particular магнитокалорический effect.
3.study of magnon - фононного interaction and processes of dissolution, disintegration магнона to magnon, the магнона on phonon in materials with large магнитострикцией.
4.study on relaxation of magnetic moments and the alignment магнонной and фононной temperatures in materials with large магнитострикцией.
5. evaluation of structural and magnetic transitions in different materials.