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As a transition metal oxide , ruthenium oxide research on condensed matter physics has been the focus of the study . Since there Ru 4d electron , the study revealed ruthenium oxide may be better 4d electronic nature of the system . For example Sr 2 RuO 4 and SrRuO 3 belong Ruddlesden-Popper series Sr n 1 RunO 3n 1 (n = 1, 2, 3 ...), but Sr 2 RuO 4 1K was in the vicinity of the superconducting transition , while SrRuO 3 160K appear in the ferromagnetic -paramagnetic transition , showing distinct properties . Right BaRuO 3 ordered or unordered doping also makes significant changes in its physical properties . But so far , the SrRuO 3 doped ferromagnetic transition temperature changes after the reason is still not a definitive conclusion . So we passed in SrRuO 3 in the double doping better research this issue. Meanwhile , in view of Cr doped SrRuO 3 Magnetic had a significant effect , we try to BaRuO 3 to study the Cr -doped Cr doped BaRuO 3 physical changes. In this paper , we SrRuO 3 and BaRuO 3 has summarized the nature of presentations, including its structure, electrical conductivity , magnetism, pseudogap , specific heat and doping research and so on. Through experiments , we SrRuO 3 and BaRuO 3 doping effects were studied. In SrRuO 3 double doped systems , Ru and Cr antiferromagnetic interaction exists between so ordered magnetic moment is reduced, while the disorder induced by doping enhances the magnetic domain walls pinning effect, making the coercivity increases. In contrast , in the BaRuO 3 Cr doped Ru in position , its magnetic properties and no substantial change, and the disorder induced by doping conductivity and specific heat of a significant effect , and SrRuO 3 situations differ , possibly Cr doped BaRuO 3 in only the equivalent of a defect. Meanwhile, 9R phase BaRuO 3 done annealing experiments show , 9R phase BaRuO 3 system is determined by its structure magnetic , is an inherent nature , and little oxygen content .
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