TY - JOUR
T1 - Kinetic control of structural and magnetic states in LuBaCo 4O 7
AU - Avci, S.
AU - Chmaissem, O.
AU - Zheng, H.
AU - Huq, A.
AU - Khalyavin, D. D.
AU - Stephens, P. W.
AU - Suchomel, M. R.
AU - Manuel, P.
AU - Mitchell, J. F.
PY - 2012/3/9
Y1 - 2012/3/9
N2 - The RBaCo 4O 7 (R = Ca, Y, Tb, Ho, Tm, Yb, Lu) compounds provide a novel topology for studying the competition between triangular geometry and magnetic order. Here, we report the structural and magnetic behavior of the Lu member of this series via neutron and synchrotron x-ray diffraction, magnetization, and resistivity measurements. We determined sequential phase transitions and a strong competition between a stable and a metastable low-temperature state that critically depends on controlled cooling rates and the associated heat removal kinetics. No evidence for long-range ordered magnetism was detected by neutron diffraction at any temperature. However, very slow spin dynamics are evidenced by time-dependent neutron diffraction measurements and can be explained by several competing magnetic phases with incommensurate short-range correlations coexisting in this material.
AB - The RBaCo 4O 7 (R = Ca, Y, Tb, Ho, Tm, Yb, Lu) compounds provide a novel topology for studying the competition between triangular geometry and magnetic order. Here, we report the structural and magnetic behavior of the Lu member of this series via neutron and synchrotron x-ray diffraction, magnetization, and resistivity measurements. We determined sequential phase transitions and a strong competition between a stable and a metastable low-temperature state that critically depends on controlled cooling rates and the associated heat removal kinetics. No evidence for long-range ordered magnetism was detected by neutron diffraction at any temperature. However, very slow spin dynamics are evidenced by time-dependent neutron diffraction measurements and can be explained by several competing magnetic phases with incommensurate short-range correlations coexisting in this material.
UR - http://www.scopus.com/inward/record.url?scp=84858025375&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.85.094414
DO - 10.1103/PhysRevB.85.094414
M3 - Article
AN - SCOPUS:84858025375
SN - 1098-0121
VL - 85
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 9
M1 - 094414
ER -