Temperature Studies of the LaMn2Si2 Intermetallide by the Raman Spectroscopy and Magnetic Force Microscopy Methods

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Аннотация

Raman spectra of the LaMn2Si2 compound were obtained for the first time by Raman spectroscopy. The change of Raman spectral characteristics in the temperature range of 263–553 K was investigated. The high sensitivity of the Raman spectroscopy method to a change in the magnetic state caused by a temperature influence has been determined. A change in the spectral characteristics of the vibration mode of manganese atoms near the Curie and Neel temperatures has been revealed. The magnetic force microscopy technique was used to investigate the surface features of the LaMn2Si2 compound at room temperature. A change in the type of magnetic domain structure in LaMn2Si2 after cooling from 298 to 263 K has been found.

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Авторлар туралы

Yu. Korkh

Miheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Хат алмасуға жауапты Автор.
Email: korkh@imp.uran.ru
Ресей, Ekaterinburg, 620108

E. Ponomareva

Miheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Email: korkh@imp.uran.ru
Ресей, Ekaterinburg, 620108

A. Druzhinin

Miheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Ural Federal University named after the First President of Russia B.N. Yeltsin

Email: korkh@imp.uran.ru
Ресей, Ekaterinburg, 620108; Ekaterinburg, 620002

E. Gerasimov

Miheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Ural Federal University named after the First President of Russia B.N. Yeltsin

Email: korkh@imp.uran.ru
Ресей, Ekaterinburg, 620108; Ekaterinburg, 620002

N. Mushnikov

Miheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Ural Federal University named after the First President of Russia B.N. Yeltsin

Email: korkh@imp.uran.ru
Ресей, Ekaterinburg, 620108; Ekaterinburg, 620002

T. Kuznetsova

Miheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Ural Federal University named after the First President of Russia B.N. Yeltsin

Email: korkh@imp.uran.ru
Ресей, Ekaterinburg, 620108; Ekaterinburg, 620002

Әдебиет тізімі

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Әрекет
1. JATS XML
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2. 1. Tetragonal crystal structure and schematic representation of vibrations of Raman-active phonon modes in LaMn2Si2.

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3. 2. Raman spectra of LaMn2Si2 at temperatures 263-298 K (a) and T = 296-553 K (b).

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4. 3. Raman peaks in the frequency range of 639-643 cm–1 LaMn2Si2 at temperatures T = 296-553 K.

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5. Fig. 4. Variation of the full width at half the maximum peak height at a frequency of 639-643 cm–1 near the Curie temperature for LaMn2Si2.

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6. 5. Variation in peak intensity at frequencies of 639-643 cm–1 near the Curie temperature for LaMn2Si2.

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7. 6. Topography (a) and corresponding magnetic force images of the LaMn2Si2 surface obtained at temperatures of 273 K (b), 283 K (c) and 298 K (d). The line size in the lower right corner of the images is 5 microns.

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