TY - JOUR
T1 - Magnetic anomalies in single crystalline Tb 5Si 3
AU - Iyer, Kartik K.
AU - Mukherjee, K.
AU - Paulose, P. L.
AU - Sampathkumaran, E. V.
AU - Xu, Y.
AU - Lser, W.
PY - 2012/3
Y1 - 2012/3
N2 - The polycrystalline form of the compound, Tb 5Si 3, crystallizing in Mn 5Si 3-type hexagonal structure, which was earlier believe to order antiferromagnetically below 69 K, has been recently reported by us to exhibit interesting magnetoresistance (MR) anomalies. In order to understand the magnetic anomalies of this compound better, we synthesized single crystals of this compound and subjected them to intense magnetization and MR studies. The results reveal that the magnetic behavior is strongly anisotropic as the easy axis is along a basal plane. There appear to be multiple magnetic features in the close vicinity of 70 K. In addition, there are multiple steps in isothermal magnetization (which could not be resolved in the data for polycrystalline data) for magnetic-field (H) along a basal plane. The sign of MR is positive in the magnetically ordered state, and, interestingly, the magnitude dramatically increases at the initial step for H parallel to basal plane, but decreases at subsequent steps as though the origin of these steps are different. However, for the perpendicular orientation (H∥[0001]), there is no evidence for any step either in M(H) or in MR(H). These results establish this compound is an interesting magnetic material.
AB - The polycrystalline form of the compound, Tb 5Si 3, crystallizing in Mn 5Si 3-type hexagonal structure, which was earlier believe to order antiferromagnetically below 69 K, has been recently reported by us to exhibit interesting magnetoresistance (MR) anomalies. In order to understand the magnetic anomalies of this compound better, we synthesized single crystals of this compound and subjected them to intense magnetization and MR studies. The results reveal that the magnetic behavior is strongly anisotropic as the easy axis is along a basal plane. There appear to be multiple magnetic features in the close vicinity of 70 K. In addition, there are multiple steps in isothermal magnetization (which could not be resolved in the data for polycrystalline data) for magnetic-field (H) along a basal plane. The sign of MR is positive in the magnetically ordered state, and, interestingly, the magnitude dramatically increases at the initial step for H parallel to basal plane, but decreases at subsequent steps as though the origin of these steps are different. However, for the perpendicular orientation (H∥[0001]), there is no evidence for any step either in M(H) or in MR(H). These results establish this compound is an interesting magnetic material.
KW - A. Intermetallics
KW - D. Magnetic properties
UR - http://www.scopus.com/inward/record.url?scp=84862780539&partnerID=8YFLogxK
U2 - 10.1016/j.ssc.2011.12.038
DO - 10.1016/j.ssc.2011.12.038
M3 - 文章
AN - SCOPUS:84862780539
SN - 0038-1098
VL - 152
SP - 522
EP - 524
JO - Solid State Communications
JF - Solid State Communications
IS - 6
ER -