Metallic glass, conductive paste, and electronic device

A metallic glass, comprising:

• aluminum (Al);
• a first element group including a transition metal and a rare earth element, the transition metal being at least one of nickel and cobalt, and the rare earth element being yttrium;
• and
• a second element group including at least one of an alkaline metal, an alkaline-earth metal, a semi-metal, and a non-metal,
• the second element group having an electronegativity difference from the aluminum of greater than or equal to about 0.25,
• the second element group is included in an amount of less than or equal to about 3 at % based on a total amount of the aluminum (Al), the first element group, and the second element group,
• wherein the metallic glass is represented by the following Chemical Formula 1,
• AlaTMbREcXd [Chemical Formula 1]
• wherein, in the above Chemical Formula 1,
• Al is aluminum,
• TM is at least one of nickel and cobalt,
• RE is yttrium,
• X is the second element group,
• 50<a≦99, 0≦b≦30, 0≦c≦30, 0<d≦3, and
• a+b+c+d=100,
• wherein the second element group includes at least one of lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), carbon (C), germanium (Ge), nitrogen (N), phosphorus (P), arsenic (As), and antimony (Sb).