Anisotropic Susceptibility of La_2-xSr_xCoO_4 related to the Spin States of Cobalt (2008)
Hollmann, N., Haverkort, M. W., Cwik, M., Benomar, M., Reuther, M., Tanaka, A., ...
We present a study of the magnetic susceptibility of La_2-xSr_xCoO_4 single crystals in a doping range 0.3=0.5. This includes the pronounced kinks observed in the inverse magnetic susceptibility,...
Moller, A., Taetz, T., Hollmann, N., Mydosh, J. A., Kataev, V., Yehia, M., ...
We report structural, magnetization, electrical resistivity and nuclear- and electron spin resonance data of the complex transition metal oxide In_2VO_5 in which structurally well-defined V-O chains...
Thermodynamics of the coupled spin-dimer system TlCuCl3 close to a quantum phase transition (2006)
Lorenz, T., Stark, S., Heyer, O., Hollmann, N., Vasiliev, A., Oosawa, A., ...
We present thermal expansion alpha, magnetostriction and specific heat C measurements of \tal, which shows a quantum phase transition from a spin-gap phase to a Neel-ordered ground state as a...
A New Multiferroic Material: MnWO4 (2006)
Heyer, O., Hollmann, N., Klassen, I., Jodlauk, S., Bohaty, L., Becker, P., ...
We report the multiferroic behaviour of MnWO$_4$, a magnetic oxide with monoclinic crystal structure and spiral long-range magnetic order. Based upon recent theoretical predictions MnWO$_4$ should...