1. A reconfigurable magnetic logic device comprising:
a first magnetic logic element and a second magnetic logic element, and a non-magnetic spacer layer therebetween, each magnetic logic element comprising a ferromagnetic pinned layer, a ferromagnetic free layer and a non-magnetic barrier layer therebetween, each of the free layers having a magnetization orientation;
an input system that defines the magnetization orientations of the free layers in accordance with a combination of a first input current and a second input current, wherein the first and second input current pass through the reconfigurable magnetic logic device; and
an output sensing system that reads an output data wherein the free layer of the first magnetic logic element and the free layer of the second magnetic logic element have different coercive fields.
2. The magnetic logic device of claim 1, wherein the first and second input currents are DC currents or current pulses.
3. The magnetic logic device of claim 1, wherein the output data is resistance.
4. A reconfigurable magnetic logic device comprising:
a first magnetic logic element and a second magnetic logic element, and a non-magnetic spacer layer therebetween, each magnetic logic element comprising a ferromagnetic pinned layer, a ferromagnetic free layer and a non-magnetic barrier layer therebetween, each of the free layers having a magnetization orientation;
an input system that defines the magnetization orientations of the free layers in accordance with a combination of a first input current and a second input current, wherein the first and second input current pass through the reconfigurable magnetic logic device; and
an output sensing system that reads an output data wherein the free layer of the first magnetic logic element is a hard free layer and the free layer of the second magnetic logic element is a soft free layer.
5. The magnetic logic device of claim 4, wherein either the first or second input current can switch the soft free layer and both the first and second input currents are needed to switch the hard free layer.
6. The magnetic logic device of claim 4, wherein the first and second input currents are DC currents or current pulses.
7. The magnetic logic device of claim 4, wherein the output data is resistance.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A process for axially bonding the hub (109) of a titanium aluminide (TiAl) turbine rotor (103) to a steel shaft (107) of a rotor shaft assembly (101) of a type used in a turbocharger for rotating about its axis (111) to drive a compressor, said process comprising:
(a) axially mounting a compact (207) of said shaft (107), comprising a steel powder admixed with a binder, to the hub (209) of a compact (203) of said rotor (103), comprising a TiAl powder admixed with a binder, with a bonding material (211) comprising a binder admixed with fine metallic powder disposed between said proximal end of said shaft compact (207) and said hub (209) to form a mounted compact (201), and
(b) debinding and sintering said mounted compact (201),
whereby said rotor (103) and said shaft (107) are bonded to form said rotor shaft assembly (101).
2. The process of claim 1, wherein said rotor compact (203) is selected to have a hub (209) that has an inner diameter that shrinks more upon sintering than does the diameter of said shaft compact (207).
3. The process of claim 1, wherein said sintering is performed from about 1200\xb0 C. to about 1430\xb0 C. for a period from about 45 min to about 2 hours.
4. The process of claim 1, wherein said powders have a particle size of from about 1 \u03bcm to 40 \u03bcm.
5. The process of claim 4. wherein said powders have a particle size of from about 1 \u03bcm to 10 \u03bcm.
6. The process of claim 1, wherein said binder is selected from the group consisting of waxes, polyolefin, polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyethylene carbonate, polyethylene glycol, and microcrystalline wax, or a mixture thereof.
7. The process of claim 1, wherein said debinding is carried out at temperature of between about 200\xb0 C. and 250\xb0 C.
8. The process of claim 1, wherein a metallurgical bond is formed between the hub (109) of the titanium aluminide (TiAl) turbine rotor (103) and the steel shaft (107).