2006/02/06 by S. Weber, P. Lunkenheimer, R. Fichtl +3 · 3 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Colossal magnetoresistance #Condensed matter physics #Dielectric #Ferroelectricity #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetocapacitance #Magnetoresistance #Materials science #Multiferroics #Multiferroics and related materials #Physics #Quantum mechanics #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.96.157202
published as Phys. Rev. Lett. 96, 157202 (2006) · 4 pages, 4 figures
arxiv created 2006/02/06 · openalex publication_date 2006/04/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present a detailed study of the dielectric and charge transport properties of the antiferromagnetic cubic spinel HgCr2S4. Similar to the findings in ferromagnetic CdCr2S4, the dielectric constant of HgCr2S4 becomes strongly enhanced in the region below 60-80 K, which can be ascribed to polar relaxational dynamics triggered by the onset of ferromagnetic correlations. In addition, the observation of polarization hysteresis curves indicates the development of ferroelectric order below about 70 K. Moreover, our investigations in external magnetic fields up to 5 T reveal the simultaneous occurrence of magnetocapacitance and magnetoresistance of truly colossal magnitudes in this material.