Surface treating method of single crystal

A surface treating method of single crystals by which the surfaces of single crystals having the crystal structure of perovskite are treated comprising dissolving two-dimensional-lattice atomic layers forming the surfaces one layer by one layer by by immersing the crystals in one solution and then in another solution.

A surface treating method of single crystals by which the {100}-plane surfaces of single crystals having the crystal structure of perovskite are treated comprising dissolving two-dimensional-lattice atomic layers forming the surfaces one layer by one layer by immersing the crystals in one solution and then in another solution.

A surface treating method of single crystals by which the {100}-plane surfaces of SrTiO.sub.3 single crystals are treated comprising dissolving two-dimensional-lattice atomic layers forming the surfaces one layer by one layer by immersing the single crystals in one solution and then in another solution.

A surface treating method of single crystals by which the {100}-plane surfaces of SrTiO.sub.3 single crystals are treated comprising dissolving two-dimensional-lattice atomic layers forming the surfaces one layer by one layer by first immersing the single crystals in a fluorine-based acidic solution and then immersing the single crystals in and by immersing the single crystals in the solutions in order.

A surface treating method of single crystals by which the {100}-plane surfaces of SrTiO.sub.3 single crystals are treated comprising dissolving two-dimensional-lattice atomic layers forming the surfaces one layer by one layer by first immersing the single crystals in a mixed solution of hydrofluoric solution and ammonium fluoride with a pH<4 and then immersing the single crystals in pure water, the immersion process is repeated while, during the immersion steps the solutions are maintained between 20.degree. C. and 35.degree. C.

A surface treating method of single crystals by which the {100}-plane surfaces of Nb-doped SrTiO.sub.3 single crystals are treated comprising dissolving two-dimensional-lattice atomic layers forming the surfaces one layer by one layer by first immersing the single crystals in a mixed solution of hydrofluoric solution and ammonium fluoride with a pH of 4 and then immersing the single crystals in pure water, during the immersion process the solutions are maintained between 20.degree. C. and 35.degree. C.

A surface treating method of single crystals by which the surfaces of single crystals having crystal structures in which two-dimensional-lattice atomic layers of metal oxides repeatedly appear comprising dissolving the atomic layers one layer by one layer and heating the surfaces of the crystals, the step of dissolving including immersing the crystals in a first solution and then a second solution.

A surface treating method of single crystals by which the {100}-plane surfaces of single crystals having the crystal structure of perovskite are treated comprising dissolving two-dimensional-lattice atomic layers forming the surfaces one layer by one layer and heating the surfaces of the crystals, the step of dissolving including immersing the crystals in one solution and then in another solution.

A surface treating method of single crystals by which the {100}-plane surfaces of SrTiO.sub.3 single crystals are treated comprising dissolving two-dimensional-lattice atomic layers forming the surfaces one layer by one layer and heating the surfaces of the crystals, the step of dissolving including immersing the crystals in one solution and then in another solution.

A surface treating method of single crystals by which the {100}-plane surfaces of SrTiO.sub.3 single crystals are treated comprising first heating the surfaces of the crystals and then dissolving two-dimensional-lattice atomic layers forming the surfaces one layer by one layer by first immersing the crystals in a fluorine-based acidic with a pH, 4 and then immersing the crystals in water, the step of heating being performed for .gtoreq.1 hour at .gtoreq.900.degree. C. and the solution and water temperature both being maintained at >35.degree. C.

A surface treating method of single crystals by which the {100}-plane surfaces of SrTiO.sub.3 single crystals are treated comprising first dissolving two-dimensional-lattice atomic layers forming the surfaces one layer by one layer and then heating crystals, the step of dissolving including immersing the crystals in a first solution of a fluorine-based acidic solution with a pH between 4 and then immersing the crystals in water with a pH between 6 and 8 and repeating the steps of immersing, the step of heating being performed for .gtoreq.1 hour at .gtoreq.900.degree. C., and the temperature of the first solution and the water being maintained between 20.degree. C. and 35.degree. C.

A surface treating method of single crystals by which the {100}-plane surfaces of Nb-doped SrTiO.sub.3 single crystals are treated comprising first heating the crystals and then dissolving two-dimensional-lattice atomic layers forming the surfaces one layer by one layer by first immersing the crystals in a fluorine-based acidic solution with a pH<4 and then immersing the crystals in water, the step of heating being performed for .gtoreq.1 hour at .gtoreq.900.degree. C., and the temperature of both the solution and the water being maintained at >35.degree. C.

A surface treating method of single crystals by which the {100}-plane surfaces of Nb-doped SrTiO.sub.3 single crystals are treated comprising dissolving two-dimensional-lattice atomic layers forming the surfaces one layer by one layer and then heating the crystals, the step of dissolving including immersing the crystals in a fluorine-based acidic solution with a pH between 4 and 5 and then immersing the crystals in water with a pH between 6 and 8, and repeating the step of dissolving, the step of heating being performed for .gtoreq.1 hour at .gtoreq.900.degree. C., and the temperature of both the solution and the water being maintained between 20.degree. C. and 35.degree. C.