Abstract
The compound PrBa 2Cu 3O x ( χ ∼ 7) is non superconducting and exhibits antiferromagnetic ordering of the Pr moments at a relatively high temperature of about 17 K. We have investigated the structural and magnetic behavior of PrBa 2Cu 3O x for two different oxygen contents ( x = 6.9 and 6.4). Magnetic susceptibility measurements show that both these compounds are ordered antiferromagnetically with Néel temperatures of 15.7 and 12.5 K and effective paramagnetic moments of 2.85 μ B and 2.94 μ B for x = 6.9 and x = 6.4 samples, respectively. The susceptibility (χ) of the x = 6.4 sample shows a pronounced peak typical of antiferromagnetic systems unlike the x = 6.9 sample where χ shows only a slight break and continues to rise even below T N .
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