MPa uniaxial pressure-induced giant lattice compression and change of electric and magnetic properties in perovskite La0.83Sr0.17MnO3 |
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| Authors: | Ning Zhang Weiping Ding Gang Li Wei Zhong Youwei Du |
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| Institution: | (1) Key Laboratory of Jiangsu Province for Optic & Electric Techniques, Nanjing Normal University, 210097 Nanjing, China;(2) National Laboratory of Solid State Microstructures, Nanjing University, 210093 Nanjing, China |
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| Abstract: | Using a method ofin situ pressing X-ray diffraction, a uniaxial pressure-induced unusual change of lattice parameters and a remarkable crystal structural
distortion have been observed in CMR perovskite La0 83Sr0.17 MnO3. The pressure coefficient of lattice parameter in 200] orientation, i.e. d (lnd
Mn-O-Mn)/dP can reach about 3.8 × 10-4 MPa-1. Under the uniaxial pressure of only about 20 MPa, a giant piezoresistance, magnetization enhancing and an evident increase
of Tp, the onset of the metal-semiconductor-like (M-S) transition, have also been obtained. These effects suggest that the structure
of CMR perovskite is very flexible and their transport properties are very structurally sensitive.
Project supported by the 85-6 NMS. |
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| Keywords: | crystal distortion piezoresistance magnetoresistance piezomagnetization |
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