Kriener M, Steffens P, Baier J, Schumann O, Zabel T, Lorenz T, Friedt O, Müller R, Gukasov A, Radaelli PG, Reutler P, Revcolevschi A, Nakatsuji S, Maeno Y, Braden M. Structural aspects of metamagnetism in Ca2-xSrxRuO4: evidence for field tuning of orbital occupation.
PHYSICAL REVIEW LETTERS 2005;
95:267403. [PMID:
16486403 DOI:
10.1103/physrevlett.95.267403]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2004] [Indexed: 05/06/2023]
Abstract
The crystal structure of Ca(2-x)Sr(x)RuO(4) with 0.2 < or = x < or = 1.0 has been studied by diffraction techniques and by high resolution capacitance dilatometry as a function of temperature and magnetic field. Upon cooling in zero magnetic field, the crystal structure and the octahedra shrink along the c direction and elongate in the a and b planes, whereas the opposite occurs upon cooling at high field (x = 0.2 and 0.5). These findings yield evidence for an orbital rearrangement driven by temperature and magnetic field, which accompanies the metamagnetic transition at low temperature. The temperature and magnetic-field dependencies are found to be governed by the same energy scale.
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