2005/01/25 by C. dela Cruz, Clarina dela Cruz, Fei Yen +8 · 5 citations
Materials Science · Mathematics · Physics and Astronomy · #Antiferromagnetism #Classification of discontinuities #Condensed matter physics #Coupling (piping) #Dielectric #Ferroelectric and Piezoelectric Materials #Ferroelectricity #Lattice (music) #Magnetic and transport properties of perovskites and related materials #Materials science #Mathematical analysis #Mathematics #Multiferroics #Multiferroics and related materials #Phase transition #Physics #Quantum mechanics #Thermal expansion #Thermodynamics #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.71.060407
published as Phys. Rev. B 71, 060407(R) (2005)
arxiv created 2005/01/25 · openalex publication_date 2005/02/22 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Evidence for a strong spin-lattice coupling in multiferroic HoMnO3 is derived from thermal expansion measurements along the a and c axes. The magnetoelastic effect results in sizable anomalies of the thermal expansivities at the antiferromagnetic (TN) and the spin rotation (TSR) transition temperatures as well as in a negative c-axis expansivity below room temperature. The coupling between magnetic orders and dielectric properties below TN is explained by the lattice strain induced by the magnetoelastic effect. At TSR various physical quantities show discontinuities that are thermodynamically consistent with a first-order phase transition.