000195514 001__ 195514
000195514 005__ 20181203023409.0
000195514 0247_ $$2doi$$a10.1103/PhysRevB.88.184427
000195514 022__ $$a1098-0121
000195514 02470 $$2ISI$$a000327384200003
000195514 037__ $$aARTICLE
000195514 245__ $$aComplex magnetic couplings in Co3TeO6
000195514 260__ $$aCollege Pk$$bAmer Physical Soc$$c2013
000195514 269__ $$a2013
000195514 300__ $$a12
000195514 336__ $$aJournal Articles
000195514 520__ $$aWe report powder and single-crystal neutron diffractionmeasurements, combinedwith x-ray powder diffraction data, to unravel the complex magnetic phase diagram and exchange coupling in Co3TeO6. The magnetic structures of the various phases differ markedly from those proposed by Ivanov et al. [Mater. Res. Bull. 47, 63 (2012)] on the basis of only powder diffraction data. The dominant exchange interactions are identified by considering the geometrical arrangement of severely distorted CoO6 octahedra and CoO4 tetrahedra, which naturally divide into two different types of layers, one of which consists of zigzag chains. These zigzag chains are the first to develop magnetic order at T-M1 = 26 K, which is incommensurate in nature. The other separate layer of Co spins develops antiferromagnetic order of Gamma 4 symmetry at zero wave vector at T-M2 = 19.5 K. Our results are consistent with the previous findings of a spontaneous polarization below T-M3 = 18 K. Our neutron powder diffraction data indicate that the increase in the single-crystal (600) Bragg peak is due to a relief of extinction rather than to magnetic effects associated with the observed anomalous variation in the incommensurate wave vector at T-M4 = 16 K. The commensurate order parameter is shown to have a small dependence on the applied electric field, whereas no such effect is found for the incommensurate ordering. Below T-M3, the thermal expansion is negative, and it also exhibits anomalies at T-M2 and T-M4. A symmetry analysis and comprehensive phase diagram are given.
000195514 700__ $$aWang, Chin-Wei$$uNatl Cent Univ, Dept Phys, Jhongli 32001, Taiwan
000195514 700__ $$aLee, Chi-Hung
000195514 700__ $$aLi, Chi-Yen$$uNatl Cent Univ, Dept Phys, Jhongli 32001, Taiwan
000195514 700__ $$aWu, Chun-Ming$$uNatl Cent Univ, Dept Phys, Jhongli 32001, Taiwan
000195514 700__ $$aLi, Wen-Hsien$$uNatl Cent Univ, Dept Phys, Jhongli 32001, Taiwan
000195514 700__ $$aChou, Chih-Chieh$$uNatl Sun Yat Sen Univ, Dept Phys, Kaohsiung 80424, Taiwan
000195514 700__ $$aYang, Hung-Duen$$uNatl Sun Yat Sen Univ, Dept Phys, Kaohsiung 80424, Taiwan
000195514 700__ $$aLynn, Jeffrey W.$$uNIST, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA
000195514 700__ $$aHuang, Qingzhen$$uNIST, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA
000195514 700__ $$aHarris, A. Brooks$$uUniv Penn, Dept Phys & Astron, Philadelphia, PA USA
000195514 700__ $$0240360$$aBerger, Helmuth$$g104502
000195514 773__ $$j88$$k18$$tPhysical Review B
000195514 909C0 $$0252170$$pLSE$$xU10153
000195514 909CO $$ooai:infoscience.tind.io:195514$$pSB$$particle
000195514 917Z8 $$x107920
000195514 937__ $$aEPFL-ARTICLE-195514
000195514 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000195514 980__ $$aARTICLE