We present results of ac susceptibility measurements highlighting the presence of thermal hysteresis and phase coexistence across the ferro-to antiferromag-netic transition in various CeFe 2 based pseudobinary systems. These results indicate that the ferro-to antiferromagnetic transition in these systems is first order in nature.

David Cabrero Souto Dpto. Computación Universidad de A Coruña Campus de Elviña s/n 15071 A Coruña, Spain [email protected] Jesús Vilares Ferro Area de Ciencias de la Computación e Inteligencia Artificial Universidad de Vigo Edificio Politécnico 32004 Ourense, Spain [email protected] Manuel Vilares Ferro Dpto. Computación Universidad de A Coruña Campus de Elviña s/n 15071 A Coruña, Spain vilares@ud...

The previous studies have shown that (a) noncovalent interactions of the ferro-heme fragment of residues 1-38 and apoprotein (1-104) of horse cytochrome c simultaneously and specifically form two isomeric complexes, types I and II resembling the native protein (the redundant residues flexibly protruding from the ordered structure); (b) the type II form but not type I appears to bind to CO; and ...

A nearby supernova (SN) explosion in the past can be confirmed by the detection of radioisotopes on Earth that were produced and ejected by the SN. We have now measured a well resolved time profile of the 60Fe concentration in a deep-sea ferromanganese crust and found a highly significant increase 2.8 Myr ago. The amount of 60Fe is compatible with the deposition of ejecta from a SN at a distanc...

BiFeO3 epitaxial films (tBFO = 1–10 nm) were grown on a LaSrMnO3 (tLSMO 70 buffer layer and capped with Ru or Ru/Al layer. The ultrathin film 3 was confirmed to be continuous flat over wide area. Piezoelectric response switching of spontaneous polarization observed in the by switching-spectroscopy piezoelectric force microscopy measurements. Using lock-in method modulation frequency 10 Hz x-ray...

Recently, multiferroic materials with the magnetoelectric coupling of ferroelectric (or anti‐ ferroelectric) properties and ferromagnetic (or antiferromagnetic) properties have attracted a lot of attention.[1-4] Among them, BiFeO3(BFO) and YMnO3has been intensively studied. For such ABO3perovskite structured ferroelectric materials, they usually show antiferromag‐ netic order because the same B...

In this work we critically evaluate methods for treating electron correlation effects in multicomponent carbides using a GGA + U framework, addressing doubts from previous works on the usability of density functional theory in the design of magnetic MAX phases. We have studied the influence of the Hubbard U-parameter, applied to Cr 3d orbitals, on the calculated lattice parameters, magnetic mom...