ɛ', ɛ", and tan 8; magnetic field along the rod sample.

251.252 3.1, 9.1

(11)

1 to 20

10-4 to 10-2

to 9.3

Estimated Limits

Uncertainty

± 2 to 3% for ε'

± 0.0002 or ±5% for tan S

± 1% for ɛ'

± 0.0001 or ± 5% for tan s

Measurement Method

(10) Circular rod specimen centered in a TE10n (n odd) rectangular waveguide cavity with a zero to 104 Oe magnetic field along the rod. Perturbation theory used; see G. Birnbaum and J. Franeau, Measurement of the dielectric constant and loss of solids and liquids by a cavity perturbation method, J. Appl. Phys., Vol. 20, Aug. 1949, 817-18. Method is approximat that of ASTM Specification C525-T-63. Specimen diameter is 0.0395 inch a 6 to 9 GHz, and may be larger, e.g., 0.075 inch at 3 and 4 GHz. Same as method (10) except that a circular TMom0 or TM011 mode resonator used. The microwave permeability factor, (u2 - a2)/u, will be assumed to be 1.1-j0.0 at 9000 Oe applied field unless other information is furnishe see H. E. Bussey and L. A. Steinert, Exact solution of a gyromagnetic sample and measurements on a ferrite, IRE Trans. on Microwave Theory and Techn., MTT-6, Jan. 1958, 72-76.

(11)

2

α

(a)

See Part 1, Section 200.103 (b) and (d), also Section 200.109 (d).

Method uses a 0.22 to 0.25-inch diameter rod in a TE011 resonator tuneable

in the

0.75/1938e 9.1 to 9.3 GHz. Generally the rod diameter in inches is

to ± 1°C.

The temperature will be set within ± 5°C and held constant Alternatively, a 1.86 inch diameter disk sample may be used.

See Part 1, Section 200.103 (b) and (d), also Section 200.109 (d).

7.6

(20) Toroidal specimen in permeameter on Q-meter or bridge. (21) Toroidal specimen in coaxial cavity or slotted line.

(22) Toroidal specimen in coaxial cavity or slotted line, or rectangular specimen in waveguide by open circuit-short circuit method; ɛ* is measured simultaneously.

(23) Rod specimen in cavity; &* must be given, or measured by method 251.252.

(a) See Part 1, Section 200.103 (b) and (d), also Section 200.109 (d).

Sphere in vibrating magnetometer; see W. E. Case and R. D. Harrington, Calibration of vibrating sample magnetometers, J. Res. NBS, Vol. 70C, Oct-Dec, 1966, 255-262. Error will increase with increased asphericity of specimen.

See Part 1, Section 200.103 (b) and (d), also Section 200.109 (d).

(24)

A sphere, or at 1.1 GHz a flat disk or an oblate ellipsoid, is placed in a
cavity resonator with an applied magnetic field. The method is described in
ASTM Specification C524-T-63. For the disk or ellipsoid, 4πM must also
be known in order to obtain g.

S

(25) Sphere in waveguide with an applied magnetic field. The surface finish of single crystal specimens must be a high polish. Orientation of single crystals is not included in the Fee List; if orientation is required, the customer should mount the sphere in a suitable plastic holder. See A. S. Risley and H. E. Bussey, Interpretation of ferromagnetic resonance measurement made in a nonresonant system, IEEE Trans. Instr. and Meas., Vol. IM-15, Dec. 1966, 393-6.

(a) See Part 1, Section 200.103 (b) and (d), also Section 200.109 (d). Limits of uncertainty depend on linewidth, 4TM, and g.

(b)

(c) Error increases at high and low values of AH.

7.9

(b)