Magnetic material and magnetic element
AssigneeNippon Telegraph and Telephone Corporation
InventorsYuki Wakabayashi, Yoshiharu Krockenberger, Hideki Yamamoto, Yoshitaka Taniyasu
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Abstract
A magnetic material is constituted of a ferromagnetic or ferrimagnetic insulator in a double perovskite structure of Sr3-xAxOs1-yByO6 (0.5≤x≤0.5, −0.5≤y≤0.5). A is an alkali metal or alkaline earth metal atom, and B is a transition metal atom, alkali metal atom, or alkaline earth metal atom). The insulator may be Sr3OsO6, where x=y=0 in the above formula. Sr3OsO6 is formed to have a cubic crystal structure where strontium atoms, osmium atoms, and oxygen atoms are arranged at lattice points.
Claims12
A magnetic material which is constituted of:
- a ferromagnetic or ferrimagnetic insulator in a double perovskite structure of Sr3-xAxOs1-yByO6;
- wherein 0≤x≤0.5;
- wherein 0≤y≤0.5;
- wherein A is an alkali metal or alkaline earth metal;
- wherein B is a transition metal, an alkali metal atom, or analkaline earth metal atom;
- and
- wherein an atomic percentage of Sr is in a range of 25 at % to 35 at %.
A magnetic device comprising:
- a magnetic layer made from a ferromagnetic insulator in a double perovskite structure of Sr3-xAxOs1-yByO6, wherein 0≤x≤0.5, wherein 0≤x≤0.5, wherein A is an alkali metal or alkaline earth metal, wherein B is a transition metal, an alkali metal atom, or analkaline earth metal atom, and wherein an atomic percentage of Sr is in a range of 25 at % to 35 at %;
- a first electrode;
- and
- a second electrode, the magnetic layer is between the first electrode and the second electrode.
Dependencies are inferred from the claim text.