Effect of hydrogen doping on the magnetic properties of Gd2CuO4 |
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Authors: | P W Klamut A Sikora H Drulis J Klamut |
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Institution: | (1) Institute of Low Temperature and Structure Research, Polish Academy of Science, P.O. Box 937, PL-50-950 Wroclaw, Poland |
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Abstract: | We report the results of ac-susceptibility and dc-magnetization measurements for HyGd2CuO4 (0y0.54). It is shown thatH doping lowers the weak ferromagnetic component in the material. The distinct hysteresis loops observed atT=77 K for both non- and hydrogenated samples change its shape withy. The magnetic ordering temperatures T
N
Cu
and T
N
Gd
, as determined from the temperature dependencies of ac-susceptibility, remain unchanged with sample's hydrogenation. This result seems to indicate that extra electrons are not doped onto the Cu-O planes of Gd2CuO4. The frequency dependencies ofx(, T) andx(, T) for bothy=0 andy=0.15 samples are analysed., The maximums ofx andx found at about 200K are considered in terms of susceptibility dependence on the spin-lattice relaxation time (). The anomalies in ac-susceptibility found recently in Gd2CuO4 atT
a=8 K andT
b=9.5 K decrease significantly withy. Results are discussed in the context of available data on 214T-type compounds. |
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Keywords: | 74 10 +V 75 30 G 75 50 Dd |
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