A Lattice Dynamical Investigation of the Raman and the Infrared Wave Numbers of MnWO_4

• Authors: H. Gupta , Ruby , M. Sinha
• Languages of publication: EN

Abstracts

EN

A short-range force constant model has been applied using normal coordinate analysis to investigate the Raman and the infrared modes in multiferroic MnWO_4 having space group P2/c. The calculation of zone centre phonons has been made with eight stretching and seven bending force constants. The calculated Raman and infrared wave numbers are in good agreement with the observed ones. The potential energy distribution has also been investigated for determining the significance of contribution from each force constant toward the Raman and the infrared wave numbers.

Keywords

EN

61.50.Ah; 63.22.Dc; 63.70.+h; 75.10.Pq; 78.30.-j

Discipline

• 61.50.Ah: Theory of crystal structure, crystal symmetry; calculations and modeling
• 63.70.+h: Statistical mechanics of lattice vibrations and displacive phase transitions
• 75.10.Pq: Spin chain models
• 63.22.Dc: Free films
• 78.30.-j: Infrared and Raman spectra(for vibrational states in crystals and disordered systems, see 63.20.-e and 63.50.-x, respectively; for Raman spectra of superconductors, see 74.25.nd)

• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 1
• Pages: 142-145

Dates

published

2012-07

received

2011-12-15

(unknown)

2012-02-20

Contributors

author

H. Gupta

• Department of Physics, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi-110016, India

author

Ruby

• Department of Physics, Sant Longowal Institute of Engineering and Technology, Longowal, Sangrur-148106, India

author

M. Sinha

• Department of Physics, Sant Longowal Institute of Engineering and Technology, Longowal, Sangrur-148106, India

References

• 1. O. Heyer, N. Hollmann, I. Klassen, S. Jodlauk, L. Bohaty, P. Becker, J.A. Mydosh, T. Lorenz, D. Khomskii, J. Phys., Condens. Matter 18, L471 (2006)
• 2. K. Taniguchi, N. Abe, H. Sagayama, S. Otani, T. Takenobu, Y. Iwasa, T. Arima, Phys. Rev. B 77, 064408 (2008)
• 3. A.H. Arkenbout, T.T.M. Palstra, T. Siegrist, T. Kimura, Phys. Rev. B 74, 184431 (2006)
• 4. L. Zhang, C. Lu, Y. Wang, Y. Cheng, Mater. Chem. Phys. 103, 433 (2007)
• 5. J. Maier, Solid State Ionics 175, 7 (2004)
• 6. H.Y. He, J.F. Huang, L.Y. Cao, J.P. Wu, Desalination 252, 66 (2010)
• 7. G. Lautenschläger, H. Weitzel, T. Vogt, R. Hock, A. Boehm, M. Bonnet, H. Fuess, Phys. Rev. B 48, 6087 (1993)
• 8. H. Ehrenberg, H. Weitzel, H. Fuess, B. Hennion, J. Phys., Condens. Matter 11, 2649 (1999)
• 9. M.N. Iliev, M.M. Gospodinov, A.P. Litvinchuk, Phys. Rev. B 80, 212302 (2009)
• 10. M. Maczka, M. Ptak, K. Hermanowicz, A. Majchrowski, A. Pikul, J. Hanuza, Phys. Rev. B 83, 174439 (2011)
• 11. L.H. Hoang, N.T.M. Hien, W.S. Choi, Y.S. Lee, K. Taniguichi, T. Arima, S. Yoon, X.B. Chen, In-Sang Yang, J. Raman Spectrosc. 41, 1005 (2010)
• 12. W.S. Choi, K. Taniguchi, S.J. Moon, S.S.A. Seo, T. Arima, H., Hoang, I.S. Yang, T.W. Noh, Y.S. Lee, Phys. Rev. B 81, 205111 (2010)
• 13. K. Taniguchi, N. Abe, T. Takenobu, Y. Iwasa, T. Arima, Phys. Rev. Lett. 97, 097203 (2006)
• 14. J. Macavei, H. Schulz, Z. Kristallogr. 207, 193 (1993)
• 15. T. Shimanouchi, M. Tsuiboi, T. Miyawaza, J. Chem. Phys. 35, 1597 (1961)

Identifiers

DOI

10.12693/APhysPolA.122.142