Thin film magnetometer

• US 3,239,754 A
• Filed: 10/09/1963
• Issued: 03/08/1966
• Est. Priority Date: 10/09/1963
• Status: Expired due to Term

• Current Assignee: Forrest G. West Jr, William J. Odom Jr
• Original Assignee: Forrest G. West Jr, William J. Odom Jr
• Inventors: Odom, William J. Jr., West, Forrest G. Jr.
• Application Number:
  US04/315,061
• Time in Patent Office: 881 Days
• US Class Current: 324/247
• CPC Class Codes: G01R 33/05 in thin-film element

Claims

1. MEANS FOR MEASURING THE INTENSITY OF AN AMBIENT MAGNETIC FIELD COMPRISING A THIN PLANAR FILM OF FERROMAGNETIC MATERIAL, SAID FILM BEING UNIAXIALLY ANISOTROPIC, A WINDING ABOUT THE FILM HAVING AN AXIS IN THE PLANE OF SAID FILM, MEANS FOR PRODUCING AN ALTERNATING MAGNETIC FIELD THROUGH THE FILM IN THE PLANE THEREOF TO GENERATE AN ALTERNATING CURRENT IN SAID WINDING, SAID ALTERNATING CURRENT HAVING A CHARACTERISTIC WHICH VARIES WITH THE INTENSITY OF THE AMBIENT MAGNETIC FIELD IN A PREDETERMINED DIRECTION IN THE PLANE OF THE FILM, THE DIRECTION OF THE ALTERNATING MAGNETIC FIELD BEING ORTHOGONALLY RELATED TO THE DIRECTION OF THE AMBIENT MAGNETIC FIELD AND ONE OF SAID FIELDS BEING PERPENDICULAR TO THE ANISOTROPIC AXIS OF THE FILM, AND MEANS COUPLED TO SAID WINDING FOR DETECTING VARIATIONS IN THE CHARACTERISTIC OF SAID ALTERNATING CURRENT IN RESPONSE TO VARIATIONS OF THE AMBIENT MAGNETIC FIELD IN SAID PREDETERMINED DIRECTION IN THE PLANE OF THE FILM.