We have investigated the magnetic and charge transport properties of single crystals Nowotney Chimney Ladder compound Cr$_{11}$Ge$_{19}$ mapped out a comprehensive phase diagram reflecting complicated interplay between Dzyaloshinskii-Moriya (DM) interaction, dipolar anisotropy. identified set interesting phases attributed finite topological Hall effect to recently discovered bi-skyrmion phase. ...

passive solar systems such as solar chimneys need solar radiation in order to work. therefore, they cannot present stable natural ventilation when solar energy vanishes: to have a more robust and stable condition, solar energy should be stored during the day and released back during the night. phase change materials can save additional thermal energy during the day and release it during the nig...