Preparation and magnetic and electrical properties of EuBaMn2O6−δ (δ=0,1)

被引：0
作者：
I. O. Troyanchuk
S. V. Trukhanov
G. M. Chobot
H. Szymczak
机构：
[1] National Academy of Sciences of Belarus,Institute of Solid
[2] Polish Academy of Sciences,State and Semiconductor Physics
来源：
Physics of the Solid State | 2003年 / 45卷
关键词：
Spectroscopy; State Physics; Perovskite; Electrical Property; Layered Structure;
D O I：
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中图分类号：
学科分类号：
摘要：
The EuBaMn2O6 composition prepared in air at T=1500°C is shown to be a cubic perovskite exhibiting spin-glass properties below Tf=40 K. The reduced composition, EuBaMn2O5, crystallizes in a perovskite-like, YBaCuFeO5-type layered structure with a tetragonal unit cell. EuBaMn2O5 with crystallographically ordered Eu3+ and Ba2+ ions is a ferromagnet with TN=160 K. The anomalous behavior of the paramagnetic susceptibility is assumed to be due to a partial ordering of the Mn2+ and Mn3+ ions. EuBaMn2O5 oxidized in air at 900°C to EuBaMn2O6 has a magnetic ordering temperature TM=260 K, near which the magnetoresistance reaches a peak value. X-ray diffraction measurements show the long-range order in the Eu3+ and Ba2+ ion arrangement to persist in the oxidized EuBaMn2O6 sample.
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页码：276 / 282
页数：6
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