Phys. Rev. B 75, 144425 (2007) [5 pages]Jahn-Teller distortion and magnetic transitions in perovskite RMnO3 (R=Ho, Er, Tm, Yb, and Lu)Received 4 January 2007; revised 2 March 2007; published 23 April 2007 The perovskite RMnO3 (R=Ho, Er, Tm, Yb, and Lu) were prepared under high pressure and studied with heat capacity and synchrotron x-ray powder diffraction measurements. The temperature interval between the antiferromagnetic transition and the first-order transition to the presumably E-type structure narrows with the decreasing ionic radius of R, and almost closes for R=Lu. Combined with the data for the larger rare earth R, the results show intricate relationship between the complex magnetic phase diagram and significant increase of Jahn-Teller distortion found for the smallest members of RMnO3. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.75.144425
DOI:
10.1103/PhysRevB.75.144425
PACS:
75.30.Kz, 65.40.Ba, 71.70.Ej, 75.47.Lx
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