Effects of Fe doping on ac susceptibility of Pr0.75Na0.25MnO3
Li Yu(李玉)a)b), Cheng Qian(程倩)c), Qi Da-Wei(戚大伟)a)b)†, Wang Ji-Liang(王继亮)a), Zhang Jing(张晶)a), Wang Shuang(王爽)a), and Guan Jing(关晶)a)
a College of Science, Northeast Forestry University, Harbin 150040, China; b Post-doctoral Mobile Research Station of Forestry Engineering, Northeast Forestry University, Harbin 150040, China; c Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China
Abstract Ac susceptibility at low temperatures of PrNaMnFeO () is investigated. The peak value of the real component of ac susceptibility at the freezing temperature is suppressed with the increasing frequency. The peak value of shows a linear relation between and the logarithm of the frequency . The normalized slope , which is much lower than canonical insulating spin glass systems in which . The peak value of the imaginary component of the ac susceptibility at for the , 0.02, 0.30 samples increases with increasing frequency, suggesting a cluster glass ground state with a coexistence of charge-ordered phase and correlated ferromagnetic clusters in spin glass matrix. The peak value of at for the sample decreases with increasing frequency, suggesting a phase separation ground state. The peak value of at for the sample decreases with increasing frequency for Hz and increases subsequently till 701~Hz, and then decreases with further increasing frequency for Hz. This complex behaviour is ascribed to the competition between the effects of large and little ferromagnetic clusters in the sample. The ground state of sample is a transition state from cluster glass to phase separation.
(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
Fund: Project supported by the Fundamental Research Funds for the Central Universities of China (Grant No. DL09BB31), the Open
Project of Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, China
(Grant No. LZUMMM2010004),the Fundamental Research Funds for the Central Universities of China (Grant No. DL09BB36),
the National Natural Science Foundation of China (Grant No. 31170518), and the Research Fund of Heilongjiang Provincial
Education Department (Grant No. 12513040).
Cite this article:
Li Yu(李玉), Cheng Qian(程倩), Qi Da-Wei(戚大伟), Wang Ji-Liang(王继亮), Zhang Jing(张晶), Wang Shuang(王爽), and Guan Jing(关晶) Effects of Fe doping on ac susceptibility of Pr0.75Na0.25MnO3 2011 Chin. Phys. B 20 117502
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