“Tunneling evidence of half-metallic ferromagnetism in La 0.7Ca0.3MnO3 epitaxial films”, J. Y. T. Wei, N.-C. Yeh, and R. P. Vasquez, Phys. Rev. Lett. 79, 5150 (1997).
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.79.5150
“Tunneling evidence of half-metallic ferromagnetism in La 0.7Ca0.3MnO3 epitaxial films”, J. Y. T. Wei, N.-C. Yeh, and R. P. Vasquez, Phys. Rev. Lett. 79, 5150 (1997).
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.79.5150