%0 Journal Article
%4 sid.inpe.br/mtc-m19@80/2010/07.19.13.27
%2 sid.inpe.br/mtc-m19@80/2010/07.19.13.27.06
%@doi 10.1103/PhysRevB.81.184428
%@issn 1539-3755
%T Magnetic ordering and transitions of EuSe studied by x-ray diffraction
%D 2010
%8 May
%A Diaz, B.,
%A Granado, Eduardo,
%A Abramof, Eduardo,
%A Torres, L.,
%A Lechner, R. T.,
%A Springholz, G.,
%A Bauer, G.,
%@affiliation Lab Nacl Luz Sincrotron, Caixa Postal 6192, BR-13083970 Campinas, SP, Brazil.
%@affiliation Univ Estadual Campinas, UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Lab Nacl Luz Sincrotron, BR-13083970 Campinas, SP Brazil
%@affiliation Johannes Kepler Univ Linz, Inst Halbleiterphys, A-4040 Linz, Austria.
%@affiliation Johannes Kepler Univ Linz, Inst Halbleiterphys, A-4040 Linz, Austria
%@affiliation Johannes Kepler Univ Linz, Inst Halbleiterphys, A-4040 Linz, Austria.
%B Physical Review E
%V 81
%N 18
%P 184 - 428
%K antiferromagnetic phase, neutron-diffraction, europium selenide, pressure.
%X The magnetic phase diagram and thermal expansion of EuSe is revisited using a high-quality 3200-angstrom-thick epitaxial film grown over a (111)BaF2 substrate. Resonant magnetic x-ray diffraction experiments reveal a highly hysteretic magnetic phase diagram between 1.8 and T-N similar to 4.7 K, in which two antiferromagnetic phases with propagation vectors (k) over right arrow (I)=[(1)/(4), (1)/(4),-(1)/(4)] (represented by up arrow up arrow down arrow down arrow) and (k) over right arrow (II)=[(1)/(2),(1)/(2),-(1)/(2)](up down arrow up down arrow) are observed. In addition, a defective phase with (k) over right arrow (III)=[h, h, -h]((1)/(4)<h<(1)/(3)) competes with the up arrow up arrow down arrow down arrow phase. Details of the temperature dependence of (k) over right arrow (III) and corresponding peak widths indicate this phase is intermediate between up arrow up arrow down arrow down arrow (h=(1)/(4)) and an ideal ferrimagnetic up arrow up arrow down arrow phase (h=(1)/(3)), and may be represented by (n x up arrow up arrow down arrow+down arrow), with mean n values between 7 and 2. High-resolution x-ray diffraction experiments show unit-cell hysteretic distortions that correlate with the transitions to the different magnetic phases existing below T-N.
%@language en
%3 dias1.pdf