Ferroelectricity in an ising chain magnet.
نویسندگان
چکیده
We report discovery of collinear-magnetism-driven ferroelectricity in the Ising chain magnet Ca3Co2-xMn(x)O6 (x approximately 0.96). Neutron diffraction shows that Co2+ and Mn4+ ions alternating along the chains exhibit an up-up-down-down ( upward arrow upward arrow downward arrow downward arrow) magnetic order. The ferroelectricity results from the inversion symmetry breaking in the upward arrow upward arrow downward arrow downward arrow spin chain with an alternating charge order. Unlike in spiral magnetoelectrics where antisymmetric exchange coupling is active, the symmetry breaking in Ca3(Co,Mn)2O6 occurs through exchange striction associated with symmetric superexchange.
منابع مشابه
Homospin single-chain magnet with 1D ferromagnetic azido-cobalt Ising-type chain.
A new 2D coordination polymer with an azide-bridged 1D homospin chain is synthesized, which shows slow magnetic relaxation and step hysteresis loop, and is ascribed to be a typical Ising-type single-chain magnet.
متن کاملEnforcing Ising-like magnetic anisotropy via trigonal distortion in the design of a W(v)–Co(ii) cyanide single-chain magnet† †This project was granted financial support from the Department of Energy (DE-FG02-02ER45999). Funds for the SQUID magnetometer were obtained from the National Science Foundation. ‡ ‡Electronic supplementary information (ESI) available. CCDC 1508991. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c7sc02925j
A new octacyanotungstate(V) based single chain magnet {[(Tpm)Co(DMF)W(CN)8]2[Co(DMF)4]$2DMF}n (1, Tpm 1⁄4 1,1,1-trispyrazoylmethane), with an effective barrier of 39.7(3) cm 1 is reported. The Ising-like magnetic anisotropy of the chain originates from the nearly parallel local orientations of the Co(II) ions with the source of the uniaxial magnetic anisotropy being a trigonal distortion of the...
متن کاملHigh order perturbation study of the frustrated quantum Ising chain
In this paper, using high order perturbative series expansion method, the critical exponents of the order parameter and susceptibility in transition from ferromagnetic to disordered phases for 1D quantum Ising model in transverse field, with ferromagnetic nearest neighbor and anti-ferromagnetic next to nearest neighbor interactions, are calculated. It is found that for small value of the frustr...
متن کاملHeat capacity peak at the quantum critical point of the transverse Ising magnet CoNb2O6
The transverse Ising magnet Hamiltonian describing the Ising chain in a transverse magnetic field is the archetypal example of a system that undergoes a transition at a quantum critical point (QCP). The columbite CoNb2O6 is the closest realization of the transverse Ising magnet found to date. At low temperatures, neutron diffraction has observed a set of discrete collective spin modes near the ...
متن کاملFerroelectricity by Bose–Einstein condensation in a quantum magnet
The Bose-Einstein condensation is a fascinating phenomenon, which results from quantum statistics for identical particles with an integer spin. Surprising properties, such as superfluidity, vortex quantization or Josephson effect, appear owing to the macroscopic quantum coherence, which spontaneously develops in Bose-Einstein condensates. Realization of Bose-Einstein condensation is not restric...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical review letters
دوره 100 4 شماره
صفحات -
تاریخ انتشار 2008