Study of Thermal Conductivity due to Spins in One-Dimensional Spin Systems AFeX₃ (A=Rb, Cs; X=Cl, Br)

Abstract:

Large contributions of the thermal conductivity due to spins, κ_spin, in low-dimensional spin systems are expected to be utilized as highly thermal conducting materials. One-dimensional spin system RbFeCl₃ with ferromagnetic chains and CsFeBr₃ with antiferromagnetic chains in magnetic fields have been prepared in order to observe the contribution of κ_spin to the value of thermal conductivity. The temperature dependence of the thermal conductivity parallel to spin chains along the c-axis, κ_//c, of RbFeCl₃ enhanced around 3 K and 10 K by the application of magnetic field. In the thermal conductivity perpendicular to c-axis, κ_⊥c, of RbFeCl₃, on the other hand, it has been found that only one peak around 3 K is enhanced by the application of magnetic field. Since κ_⊥c is mainly owing to the thermal conductivity due to phonons, κ_phonon, it has been concluded the peak of κ_//c around 10 K in magnetic fields is due to the contribution of κ_spin. For CsFeBr₃, it has been found that κ_//c shows two peaks around 3 K and 25 K while κ_⊥c shows one peak around 12 K in zero field. This indicates that there is a marked contribution of κ_spin to κ_//c. _κ⊥ However, the details of the marked contribution of κ_spin to κ_//c are not yet clear, since κ_//c has been suppressed by the application of magnetic field in contrast with the enhancement of the thermal conductivity in RbFeCl₃.

• Periodical: Materials Science Forum (Volume 827)
• Pages: 243-247
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.827.243
• Online since: August 2015
• Authors: Riesma Tasomara, Takayuki Kawamata, Y. Matsuoka, H. Sudo, K. Naruse, M. Ohno, H. Nagasawa, Y. Hagiya, T. Sasaki, Risdiana Risdiana, Yoji Koike
• Keywords: Magnetic Field Effect, One-Dimensional Spin System, Single Crystal, Thermal Conductivity, Thermal Conductivity due to Spins

References

[1] A.V. Sologubenko, K. Gianno, H. R. Ott, Heat transport by lattice and spin excitations in the spin-chain compounds SrCuO2 and SrCuO3, Phys. Rev. B 64 (2001) 054412.

[2] Y. Matsuoka, T. Kawamata, K. Naruse, M. Ohno, Y. Nishiwaki, T. Kato, T. Sasaki, and Y. Koike, Observation of the Thermal Conductivity due to Spins in the One-Dimensional Antiferromagnetic Ising-Like Spin System ACoX3(A=Rb, Cs; X=Cl, Br), J. Phys. Soc. Jpn. 83 (2014).

DOI: 10.7566/jpsj.83.064603

[3] M. F. Collins, O. A Patrenko, Triangular Antiferromagnets, Can. J. Phys. 75 (1997) 65.

[4] H. Yoshizawa, W. Kozukue, and K. Hirakawa, Neutron Scattering Study of Magnetic Excitations in Pseudo-One-Dimensional Singlet Ground State Ferromagnets CsFeCl3 and RbFeCl3 J. Phys. Soc. Jpn. 49 (1980) 144.

DOI: 10.1143/jpsj.49.144

[5] B. Dorner, D. Visser, U. Steigenberger, K. Kakurai, M. Steiner, Magnetic excitations in the quasi one-dimensional antiferromagnetic singlet groundstate system CsFeBr3, Z. Phys. B: Condens. Matter 72 (1988) 487.

DOI: 10.1007/bf01314530

[6] D. Visser, B. Dorner, and M. Steiner, Magnetic excitations of the singlet ground state antiferromagnet CsFeBr3 in a magnetic field, Physica B 174 (1991) 25.

DOI: 10.1016/0921-4526(91)90569-z

[7] C. F. Putnik, G. M. Cole, Jr., B. B. Garrett, and S. L. Holt, Physical Properties of Linear-Chain Systems. III. Absorption Spectra of RbFeBr3, CsFeBr3, RbFeC13, CsFeC13, and CsMg1-xFexCl3, Inorg. Chem. 15 (1976) 826.

DOI: 10.1021/ic50158a019

[8] Berman R, Thermal Conductions in Solids, Clarendon Press, Oxford, (1976).

[9] P.A. Montano, H. Shechter, E. Cohen and J. Makovsky, Mössbauer Study on CsFeCl3 and RbFeCl3, Phys. Rev. B 9 (1974) 1066.

[10] S. Bocquet, Mössbauer Study of CsFeBr3, Phys. Rev. B 37 (1988) 7840.