Phase coexistence and metastability in polycrystalline Pr0.2La0.8Fe11.4Al1.6 compound
Phase coexistence and metastability in polycrystalline Pr0.2La0.8Fe11.4Al1.6 compound
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多晶Pr0.2La0.8Fe11.4Al1.6化合物的相共存和亚稳定性
DOI:
10.1088/0953-8984/20/27/275235
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发表时间:
2008-06
期刊:
影响因子:
--
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中科院分区:
文献类型:
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Electrical resistivity, dc magnetization, ac magnetic susceptibility, and magnetic relaxation studies of polycrystalline Pr0.2La0.8Fe11.4Al1.6 compound have been carried out. On the basis of the measurements of isofield magnetization and ac magnetic susceptibility, we provide evidence for phase coexistence (the appearance of the ferromagnetic phase in the antiferromagnetic matrix) rather than a spin glass, resulting in a cusp observed at ∼70 K in the zero-field-cooled thermal magnetization curve under low fields. The ferromagnetic clusters or nuclei appear randomly in the antiferromagnetic matrix according to the electrical resistivity results. An excellent magnetic–resistive correspondence is observed under medium fields. Under these fields large relaxation effects are presented in the vicinity of the phase transition temperature. Nonuniform variation of the relaxation rate with temperature gives a clear picture of the nucleation and growth of phases. Distinct metastable behavior is shown during the phase transition, which brings about the step-like behavior in the various magnetization curves.
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影响因子:
3.7
作者:
S. Roy;M. Chattopadhyay;P. Chaddah;J. Moore;G. Perkins;L. Cohen;K. Gschneidner;V. Pecharsky
通讯作者:
S. Roy;M. Chattopadhyay;P. Chaddah;J. Moore;G. Perkins;L. Cohen;K. Gschneidner;V. Pecharsky
DOI:
10.1103/physrevb.34.169
发表时间:
1986-07
期刊:
Physical review. B, Condensed matter
影响因子:
--
作者:
R. Helmholdt;Thomas Palstra;G. Nieuwenhuys;J. Mydosh;A. M. Kraan;K. Buschow
通讯作者:
R. Helmholdt;Thomas Palstra;G. Nieuwenhuys;J. Mydosh;A. M. Kraan;K. Buschow
影响因子:
3.7
作者:
M. Chattopadhyay;S. Roy;A. Nigam;K. S. Sokhey;P. Chaddah
通讯作者:
M. Chattopadhyay;S. Roy;A. Nigam;K. S. Sokhey;P. Chaddah
影响因子:
3.7
作者:
F. Pérez-Reche;M. Stipcich;E. Vives;L. Mañosa;A. Planes;M. Morin
通讯作者:
F. Pérez-Reche;M. Stipcich;E. Vives;L. Mañosa;A. Planes;M. Morin
影响因子:
3.7
作者:
Ouyang W. Zhong;V. Pecharsky;K. Gschneidner;D. Schlagel;T. Lograsso
通讯作者:
Ouyang W. Zhong;V. Pecharsky;K. Gschneidner;D. Schlagel;T. Lograsso