TY - GEN
T1 - Study of thermal conductivity due to spins in one-dimensional spin systems AFeX3 (A=Rb, Cs; X=Cl, Br)
AU - Tasomara, R.
AU - Kawamata, T.
AU - Matsuoka, Y.
AU - Sudo, H.
AU - Naruse, K.
AU - Ohno, M.
AU - Nagasawa, H.
AU - Hagiya, Y.
AU - Sasaki, T.
AU - Risdiana,
AU - Koike, Yoji
N1 - Publisher Copyright:
© (2015) Trans Tech Publications, Switzerland.
PY - 2015
Y1 - 2015
N2 - Large contributions of the thermal conductivity due to spins, κspin, in low-dimensional spin systems are expected to be utilized as highly thermal-conducting materials. Single crystals of one-dimensional spin systems RbFeCl3 with ferromagnetic (FM) chains and CsFeBr3 with antiferromagnetic (AF) chains have been prepared in order to observe the contribution of κspin to the thermal conductivity. The thermal conductivity parallel to spin chains along the c-axis, κ//c, of RbFeCl3 has been found to be enhanced around 3 K and 10 K by the application of magnetic field. In the thermal conductivity perpendicular to the c-axis, κ⊥c, of RbFeCl3, on the other hand, only one peak around 3 K has been found to be enhanced by the application of magnetic field. Since κ⊥c is mainly owing to the thermal conductivity due to phonons, κphonon, it has been concluded that the peak of κ//c around 10 K in magnetic fields is due to the contribution of κspin. 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 κspin to κ//c. However, the details are not yet clear. It has been found that κ//c in RbFeCl3 is enhanced by the application of magnetic field while κ//c in CsFeBr3 is suppressed. The difference may be due to the difference between FM chains in RbFeCl3 and AF chains in CsFeBr3.
AB - Large contributions of the thermal conductivity due to spins, κspin, in low-dimensional spin systems are expected to be utilized as highly thermal-conducting materials. Single crystals of one-dimensional spin systems RbFeCl3 with ferromagnetic (FM) chains and CsFeBr3 with antiferromagnetic (AF) chains have been prepared in order to observe the contribution of κspin to the thermal conductivity. The thermal conductivity parallel to spin chains along the c-axis, κ//c, of RbFeCl3 has been found to be enhanced around 3 K and 10 K by the application of magnetic field. In the thermal conductivity perpendicular to the c-axis, κ⊥c, of RbFeCl3, on the other hand, only one peak around 3 K has been found to be enhanced by the application of magnetic field. Since κ⊥c is mainly owing to the thermal conductivity due to phonons, κphonon, it has been concluded that the peak of κ//c around 10 K in magnetic fields is due to the contribution of κspin. 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 κspin to κ//c. However, the details are not yet clear. It has been found that κ//c in RbFeCl3 is enhanced by the application of magnetic field while κ//c in CsFeBr3 is suppressed. The difference may be due to the difference between FM chains in RbFeCl3 and AF chains in CsFeBr3.
KW - Magnetic field effect
KW - One-dimensional spin system
KW - Single crystal
KW - Thermal conductivity
KW - Thermal conductivity due to spins
UR - http://www.scopus.com/inward/record.url?scp=84945184121&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84945184121&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.827.243
DO - 10.4028/www.scientific.net/MSF.827.243
M3 - Conference contribution
AN - SCOPUS:84945184121
SN - 9783038355472
T3 - Materials Science Forum
SP - 243
EP - 247
BT - Functional Properties of Modern Materials
A2 - Risdiana, null
A2 - Triyana, Kuwat
A2 - Triyana, Kuwat
A2 - Nugroho, Agustinus Agung
PB - Trans Tech Publications Ltd
T2 - 2nd International Conference on Functional Materials Science, ICFMS 2014
Y2 - 12 November 2014 through 13 November 2014
ER -