Virginia Tech. Physics DepartmentMontana State University. Department of PhysicsLong, Jerome R.Haines, Donald N.Drumheller, John E.2015-05-212015-05-211988-04-15Long, J. R., Haines, D. N., Drumheller, J. E. (1988). Magnetic tricritical behavior of ethylammonium tetrachlorocuprate. Journal of Applied Physics, 63(8), 3031-3033. doi: 10.1063/1.3408830021-8979http://hdl.handle.net/10919/52383In order to investigate the prediction by Tuthill that a tricritical point may exist in the phase diagram of spin_flop antiferromagnets with intermediate anisotropy, an experimental reexamination of the phase diagram of the quasi_two_dimensional system (C2H5NH3)2CuCl4 was performed. Measurements were made of the differential magnetic susceptibility,d M/d H, vs dc field and temperature in the (10 K, 100 Oe) region of the proposed tricritical point. A low amplitude, low frequency, ac biphase SQUID susceptometer was used. The sample was a single crystal with field along the antiferromagnetic easy (orthorhombic a_axis) direction. The data show some evidence of the existence of at least one tricritical point, but the results are not definitive.4 pagesapplication/pdfenIn CopyrightAntiferromagnetismPhase diagramsAlternating current power transmissionMagnetic anisotropyMagnetic susceptibilitiesArticle - Refereedhttp://scitation.aip.org/content/aip/journal/jap/63/8/10.1063/1.340883https://doi.org/10.1063/1.340883