| Autor: |
KOMEDERA, K., MUNIRAJU, N. K. CHOGONDAHALLI |
| Předmět: |
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| Zdroj: |
Acta Physica Polonica: A; Feb2024, Vol. 145 Issue 2, p128-132, 5p |
| Abstrakt: |
It is well established that many material properties, such as multiferroicity, magnetoresistance, or magnetoelectricity, emerge from strong interactions of spins and lattice (phonons). An in-depth understanding of spin-phonon coupling is key to understanding these properties. We demonstrate strong spin-phonon coupling in HoCrO3 using powder X-ray diffraction measurements. Our investigations confirm magnetoelastic effects below antiferromagnetic phase transition, TN • 142 K. The lattice parameters and unit cell volume decrease normally with temperature up to ~ TN, but decrease anomalously below TN. By fitting the background thermal expansion for a non-magnetic lattice using the Debye-Grüneisen equation, we determined the lattice strain ΔVM due to the magnetoelastic effects as a function of temperature. We have also established that the lattice strain due to the magnetoelastic effect in HoCrO3 couples with the square of the ordered magnetic moment of the Cr3+ ion. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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