Effects of lattice distortion, polaron conduction and double-exchange interaction on the physical properties of magnetoresistive manganites and cobaltites

机译：晶格畸变，极化子传导和双交换相互作用对磁阻锰矿和钴矿物理性能的影响

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The relevance of lattice distortion, polaron conduction, and double-exchange interaction to the occurrence of colossal magnetoresistance (CMR) is investigated by comparing the physicla properties of magnetoresistive manganites and cobaltites. The samples studied in this work include epitaxial films and ceramics of manganites with both A- and B-site substitution, (La_0.7Ca_0.3MnO_3, LaMn_0.7Ni_0.3O_3,LaMn_0.5Ni_0.5O_3), as well as epitaxial films and ceramics of cobaltites (La_0.5Ca_0.5CoO_3). The structural, chemical, electrical transport, magnetic, optical properties and tunneling spectroscopy are studied. Based on our experimental results, we conclude that both double-exchange interaction and strong electron-phonon coupling due to the Jahn-Teller effect are essential to the occurrence of CMR.

机译：通过比较磁阻锰矿和钴矿的物理化学性质，研究了晶格畸变，极化子传导和双交换相互作用与巨磁致电阻（CMR）发生的相关性。在这项工作中研究的样品包括具有A和B位置替代的锰矿的外延膜和陶瓷（La_0.7Ca_0.3MnO_3，LaMn_0.7Ni_0.3O_3，LaMn_0.5Ni_0.5O_3），以及外延膜和陶瓷钴矿（La_0.5Ca_0.5CoO_3）。研究了结构，化学，电传输，磁，光学性质和隧穿光谱。根据我们的实验结果，我们得出结论，由于Jahn-Teller效应引起的双交换相互作用和强电子-声子耦合对于CMR的发生至关重要。

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《Symposium on Epitaxial Oxide Thin Films III March 31-April 2, 1997, San Francisco, California,U.S.A》|1997年|p.145-156|共12页
会议地点 San Francisco CA(US)
作者
N.-C.Yeh; R.P.Vasquez; J.Y.T.Wei; C.C.Fu; G.BeAch; J.Huyah; A.V.Samoilov; A.V.Boris; N.N.Kovaleva; A.V.Bazhenov;
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3. Influence of Zeeman splitting and thermally excited polaron states on magnetoelectrical and magnetothermal properties of magnetoresistive polycrystalline manganite La_(0.8)Sr_(0.2)MnO_3 [J] . S. Sergeenkov, J. Mucha, M. Pekala, Journal of Applied Physics . 2007,第8期

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4. Effects of lattice distortion, polaron conduction and double-exchange interaction on the physical properties of magnetoresistive manganites and cobaltites [C] . N.-C.Yeh, R.P.Vasquez, J.Y.T.Wei, Symposium on epitaxial oxide thin films . 1997

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机译：晶格畸变，极化子导电和双交换相互作用对磁阻锰锰矿和钴酸盐物理性能的影响

Effects of lattice distortion, polaron conduction and double-exchange interaction on the physical properties of magnetoresistive manganites and cobaltites

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