Elastic and magnetic properties of the bilayer manganese oxide (Pr0.6 La0.4) 1.2 Sr1.8 Mn2 O7

Yoshiki Nakanishi, Kota Shimomura, Tomoyuki Kumagai, Michiaki Matsukawa, Masahito Yoshizawa, Ramanathaan Suryanarayanan, Jagdish Singh Thakur, Mircea Apostu, Alexandre Revcolevschi, Shintaro Nakamura

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The elastic and magnetic properties of a single crystal of the bilayer manganese oxide (Pr0.6 La0.4) 1.2 Sr1.8 Mn2 O7 have been investigated by means of ultrasonic and high-field magnetization measurements. Remarkable changes in the elastic constants C11, C33, C44, and C66 as a function of temperature and magnetic field have been observed. In particular, a distinct elastic anomaly was observed at low temperatures and in magnetic fields when crossing the phase boundary between the paramagnetic insulating and the field-induced ferromagnetic metallic state. A pronounced elastic softening as a function of magnetic field (H) appears across the boundary of the low-temperature magnetic phase below around 40 K, accompanied by a distinct hysteresis. In the high-field region, however, these elastic constants exhibit a monotonic increase upon increasing the magnetic field. The high-field magnetization measurements characterizing the magnetic state point out a strong coupling between the elastic strain and the magnetic moment. The data can be described reasonably well considering a strong coupling between elastic strain and magnetic susceptibility χm =∂M/∂H.

Original languageEnglish
Article number094416
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number9
DOIs
Publication statusPublished - 2007 Sep 25

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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