Show simple item record

Панкрац Анатолий Иванович A. Pankrats
Kolkov, M.
Martynov, S.
Popkov, S.
Krasikov, A.
Balaev, A.
Gorev, M.
2020-01-20T07:54:40Z
2020-01-20T07:54:40Z
2019-02
Панкрац Анатолий Иванович A. Pankrats. Peculiarities of a magnetic transition in a quasi-one-dimensional ferromagnet PbMnBO4 [Текст] / Панкрац Анатолий Иванович A. Pankrats, M. Kolkov, S. Martynov, S. Popkov, A. Krasikov, A. Balaev, M. Gorev // Journal of Magnetism and Magnetic Materials. — 2019. — Т. 471. — С. 416-422
03048853
https://doi.org/10.1016/j.jmmm.2018.09.098
http://elib.sfu-kras.ru/handle/2311/129087
Near the Curie temperature TC=30.3 K, the temperature dependences of the magnetization and heat capacity of a single-crystal ferromagnet PbMnBO4 in the magnetic fields of 1, 3, 10 and 30 kOe are studied. In the strong magnetic fields, both the magnetic contribution to the specific heat and the nonlinearity of the field dependences of the magnetization are maintained up to the temperatures exceeding TC more than twice. It is assumed that in PbMnBO4 the difference between TC, the paramagnetic Curie temperature θ=49 K and the broad temperature region above TC where the magnetic contribution to the specific heat is significant is due to the quasi-one-dimensional character of the magnetic structure of this ferromagnet. Using both the estimation of TC from the Ginzburg-Landau field theory and the θ value, the total exchange interaction parameters 2J≈40.4 K (intrachain) and z′J′≈8.8 K (interchain) are determined, with z′=4 being the number of neighboring chains. The estimation shows that the Ginzburg-Landau field theory describing the quasi-one-dimensional behavior of PbMnBO4 is well applicable in the temperature range from to T=S2J≈80 K. Above this temperature, the mean field approximation with the exchange parameter λθ based on the paramagnetic Curie temperature θ describes well the experimental temperature dependences of the magnetization in the strong magnetic field and the specific heat is determined by the lattice contribution.
ферромагнетизм
квазиодномерная структура
обменные взаимодействия
теплоемкость
магнитные свойства
Peculiarities of a magnetic transition in a quasi-one-dimensional ferromagnet PbMnBO4
Journal Article
Journal Article Preprint
416-422
29.19.39
2020-01-20T07:54:40Z
10.1016/j.jmmm.2018.09.098
Институт инженерной физики и радиоэлектроники
Базовая кафедра физики твердого тела и нанотехнологий
Кафедра теплофизики
Journal of Magnetism and Magnetic Materials
Q2
Q2


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record