TY - JOUR
T1 - Structural and magnetic studies of 1% Ho:Gd0.99- xLax alloys
AU - Rais, A.
AU - Al-Omari, I. A.
AU - Lataifeh, M. S.
N1 - Funding Information:
We would like to thank Sultan Qaboos University for the support provided to perform this study under the research grant number IG/SCI/PHYS/03/03. Special thanks to Dr. David Bunbury, Manchester University for providing the samples.
PY - 2005/3
Y1 - 2005/3
N2 - 1% Ho:Gd0.99-xLax (x=0.1, 0.25, 0.4 and 0.5) alloys have been studied using X-ray diffraction (XRD), vibrating sample magnetometry (VSM) and Faraday magnetic susceptometry (FMS). XRD patterns show a single hexagonal type phase structure with lattice parameters depending on the Lanthanum concentration. VSM measurements were performed within the temperature range of 130-380 K and at maximum magnetic field of 13.5 kOe. FMS measurements were performed within the temperature range of 77-400 K and at magnetic field of 8 kOe. The sample with x=0.1 shows a ferromagnetic behavior up to a Curie temperature of 280 K whereas the three other samples are found to be paramagnetic within our temperature range of study. Furthermore, the saturation magnetization MS for sample x=0.1 decreases with increasing temperature and the estimated magnetic moment by extrapolation of MS versus T3/2 to T=0K is (6.15±0.05) μB/f.u. The reciprocal of the molar magnetic susceptibilities of all samples appear to obey Curie-Weiss law in the paramagnetic region.
AB - 1% Ho:Gd0.99-xLax (x=0.1, 0.25, 0.4 and 0.5) alloys have been studied using X-ray diffraction (XRD), vibrating sample magnetometry (VSM) and Faraday magnetic susceptometry (FMS). XRD patterns show a single hexagonal type phase structure with lattice parameters depending on the Lanthanum concentration. VSM measurements were performed within the temperature range of 130-380 K and at maximum magnetic field of 13.5 kOe. FMS measurements were performed within the temperature range of 77-400 K and at magnetic field of 8 kOe. The sample with x=0.1 shows a ferromagnetic behavior up to a Curie temperature of 280 K whereas the three other samples are found to be paramagnetic within our temperature range of study. Furthermore, the saturation magnetization MS for sample x=0.1 decreases with increasing temperature and the estimated magnetic moment by extrapolation of MS versus T3/2 to T=0K is (6.15±0.05) μB/f.u. The reciprocal of the molar magnetic susceptibilities of all samples appear to obey Curie-Weiss law in the paramagnetic region.
KW - Curie temperature
KW - Magnetic susceptibility
KW - Saturation magnetization
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U2 - 10.1016/j.jmmm.2004.09.008
DO - 10.1016/j.jmmm.2004.09.008
M3 - Article
AN - SCOPUS:13644254442
SN - 0304-8853
VL - 288
SP - 214
EP - 218
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
ER -