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Structural-modulation-driven low-temperature glassy behavior in SrRuO3

Sow, Chanchal and Samal, D and Kumar, PSAnil and Bera, AK and Yusuf, SM (2012) Structural-modulation-driven low-temperature glassy behavior in SrRuO3. In: PHYSICAL REVIEW B, 85 (22).

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We present a critical investigation on the structural, magnetic, and magnetotransport properties of two sets of polycrystalline SrRuO3 samples with uniquely defined ferromagnetic transition temperatures. The ac magnetic susceptibility study exhibits the remarkable memory effect, a distinct characteristic of glassy behavior, at low temperatures. The transport study suggests a crossover from Fermi-liquid to non-Fermi-liquid behavior. Most strikingly, the temperature-dependent magnetoresistance exhibits two distinct dips (one around ferromagnetic ordering temperature and the other around 50 K), resembling a double-well potential in appearance. In addition, the temperature-dependent coercive field shows a plateau around 50 K. An attempt has been made to employ neutron diffraction to understand the genesis of such unusual low-temperature magnetic features. From the neutron-diffraction study, we find the evidence for changes in the unit-cell lattice parameters around 60 K and, thus, believe that the low-temperature anomalous magnetic response is closely intertwined to lattice-parameter change.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to American Physical Society
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Francis Jayakanth
Date Deposited: 16 Jul 2012 10:22
Last Modified: 16 Jul 2012 10:22
URI: http://eprints.iisc.ac.in/id/eprint/44827

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