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000003497 084__ $$2WoS$$aPhysics, Condensed Matter
000003497 1001_ $$0P:(DE-Juel1)144092$$aLi, H.-F.$$b0$$uFZJ
000003497 245__ $$aCrystal and magnetic structure of single-crystal La1-xSrxMnO3 (x ~ 1/8)
000003497 260__ $$aBerlin$$bSpringer$$c2009
000003497 300__ $$a149 - 157
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000003497 440_0 $$01982$$aEuropean Physical Journal B$$v67$$x1434-6028
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000003497 520__ $$aA neutron powder diffraction (NPD) study on the crystal and magnetic structure of a crushed La1-xSrxMnO3 (x approximate to 1/8) single crystal has been performed. The sample belongs to orthorhombic (Pnma, O) above the Jahn-Teller (JT) transition temperature (T-JT) and monoclinic (P12(1)/c1, M') in the JT regime. We have also refined the NPD data below the charge/orbital ordering (CO/OO) temperature (T-CO/OO) with a monoclinic (P12(1)/c1, M'') model because the experimental resolution was insufficient to clearly identify a triclinic (P (1) over bar) structure. The refined lattice parameters show an obvious breathing-mode distortion between T-CO/OO and T-JT, accompanied by a large deviation of the monoclinic angle beta from 90 degrees, signifying a very strong cooperative JT distortion. A ferromagnetic (FM) moment of 3.43(5) mu(B)/Mn besides an A-type antiferromagnetic (A-AFM) moment of 0.54(2) mu(B)/Mn is directed mainly along the b axis in P12(1)/c1 symmetry at 5 K. With increasing temperature, the A-AFM domains transform into FM ones above similar to 100 K and the FM spin orientation turns from the b to the c axis in crystallographic b-c plane below T-c = 187(1) K. The magnetization measurements show typical anomalies around T-CO/OO and T-JT. The measured saturation moment of 3.9(1) mu(B)/Mn at 70 kOe and 5 K is well consistent with the sum 3.97(5) mu(B)/Mn of the refined FM and A-AFM moments at 5 K, implying the A-AFM spins are aligned in field direction at 70 kOe. The applied magnetic field can affect the paramagnetic insulating (PMI) state in the range of magnetic polarons. Based on the size of JT distortion and the bond-valence sums (BVS's), the CO/OO phenomenon is being discussed.
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000003497 7001_ $$0P:(DE-Juel1)130991$$aSu, Y.$$b1$$uFZJ
000003497 7001_ $$0P:(DE-Juel1)131047$$aXiao, Y. G.$$b2$$uFZJ
000003497 7001_ $$0P:(DE-Juel1)VDB57858$$aPersson, J.$$b3$$uFZJ
000003497 7001_ $$0P:(DE-Juel1)130836$$aMeuffels, P.$$b4$$uFZJ
000003497 7001_ $$0P:(DE-Juel1)130572$$aBrückel, T.$$b5$$uFZJ
000003497 773__ $$0PERI:(DE-600)1459068-2$$a10.1140/epjb/e2009-00019-5$$gVol. 67, p. 149 - 157$$p149 - 157$$q67<149 - 157$$tThe @European physical journal / B$$v67$$x1434-6028$$y2009
000003497 8567_ $$uhttp://dx.doi.org/10.1140/epjb/e2009-00019-5
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