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Abstract
Single-phase HoCrO3 samples were prepared using the conventional solid-state reaction. The temperature dependence of dc magnetic properties show that the ZFC and FC magnetization curves are irreversible strongly and nearly symmetrical below 141.0 K under 100 Oe. Moreover, there appears a novel magnetization behavior with negative magnetization (diamagnetism-like) characteristics. This behavior exhibits the coexistence of canted antiferromagnetic and weak ferromagnetic phase and the existence of competition mechanism below Tc1 = 141.0 K. In addition, it is also proved that Ho ion ordered weak CAFM below 7.5 K. The current novel magnetization can be interpreted from the interaction between paramagnetic Ho3+ moments and canted Cr3+ moments.
Acknowledgments
This work is supported by the National Natural Science Foundation of China (NSFC, 10774097, 10674092), Program for Changjiang Scholars and Innovative Research Team in University (IRT0739), The Science & Technology Committee of Shanghai Municipality (08dj1400202, 07JC14022), The Science and Technology Innovation Fund of the Shanghai Education Committee (09ZZ95), The Natural Science Foundation of Henan Province (092300410138), and the Basic Research Plan on Natural Science of the education department of Henan Province (2009A140010).
