72.15.Eb Electrical and thermal conduction in crystalline metals and alloys
75.30.Cr Saturation moments and magnetic susceptibilities
75.60.Ch Domain walls and domain structure
76.60.−k Nuclear magnetic resonance and relaxation
Yu.S. Orlov, S.V. Nikolaev et al “Features of spin crossovers in magnetic materials ” 66 647–672 (2023)
71.30.+h , 75.30.Cr , 75.30.Et , 75.47.Lx , 75.50.Pp (all )
E.I. Kuznetsova, É.B. Fel’dman, D.E. Feldman “Magnus expansion paradoxes in the study of equilibrium magnetization and entanglement in multi-pulse spin locking ” 59 577–582 (2016)
03.65.−w , 03.67.Mn , 76.60.−k (all )
V.N. Samofalov, D.P. Belozorov, A.G. Ravlik “Strong stray fields in systems of giant magnetic anisotropy magnets ” 56 269–288 (2013)
07.55.Db , 41.20.Gz , 75.30.Gw , 75.50.−y , 75.60.Ch , 81.40.Rs (all )
“90th anniversary of the birth of A S Borovik-Romanov (Scientific session of the Physical Sciences Division of the Russian Academy of Sciences, 24 March 2010) ” 53 843–858 (2010)
01.10.Fv , 01.60.+q , 01.65.+g , 03.75.Hh , 67.30.er , 75.30.Ds , 75.40.−s , 75.45.+j , 75.50.Ee , 75.50.−y , 76.60.−k , 75.70.−i (all )
Yu.M. Bunkov “Spin superfluidity and magnons Bose — Einstein condensation ” 53 848–853 (2010)
67.30.er , 75.45.+j , 76.60.−k (all )
A.I. Morosov, A.S. Sigov “Surface spin-flop transition in an antiferromagnet ” 53 677–689 (2010)
75.30.Kz , 75.40.−s , 75.50.Ee , 75.60.Ch , 75.70.−i (all )
S.Yu. Mesnyankin, A.G. Vikulov, D.G. Vikulov “Solid-solid thermal contact problems: current understanding ” 52 891–914 (2009)
44.10.+i , 66.70.Df , 72.15.Eb (all )
N.B. Ivanova, S.G. Ovchinnikov et al “Specific features of spin, charge, and orbital ordering in cobaltites ” 52 789–810 (2009)
71.30.+h , 75.30.Cr , 75.50.Pp (all )
A.V. Kessenikh “Magnetic resonance: discovery, investigations, and applications ” 52 695–722 (2009)
01.65.+g , 76.30.−v , 76.60.−k , 76.70.−r (all )
A.G. Lundin, V.E. Zorin “Nuclear magnetic resonance in condensed matter ” 50 1053–1077 (2007)
76.60.−k , 82.56.−b , 87.61.−c (all )
A.G. Krushel’nitckii “Exchange NMR spectroscopy in solids: application in large-scale conformational biopolymer dynamics studies ” 48 781–796 (2005)
76.60.−k , 82.56.−b , 82.56.Pp (all )
V.V. Dmitriev, V.V. Zav’yalov et al “Superfluid phases of 3 He in aerogel ” 46 438–442 (2003)
67.57.−z , 76.60.−k (all )
G.S. Kandaurova “New phenomena in the low-frequency dynamics of magnetic domain ensembles ” 45 1051–1072 (2002)
05.65.+b , 75.60.Eg, 75.60.Ch , 75.70.Kw (all )
S.V. Maleev “Polarized neutron scattering in magnets ” 45 569–596 (2002)
75.25.+z , 75.40.Gb , 75.50.−y , 75.60.Ch (all )
A.P. Zhernov, A.V. Inyushkin “Kinetic coefficients in isotopically disordered crystals ” 45 527–552 (2002)
66.70.+f , 72.10.−d , 72.15.Eb , 72.20.Pa (all )
V.V. Dmitriev “New NMR modes in superfluid 3 He-B ” 43 639–642 (2000)
67.57.Lm , 76.60.−k (all )
A.I. Smirnov “Magnetic resonance of intrinsic and extrinsic defects in a spin-Peierls magnet CuGeO3 ” 43 642–646 (2000)
75.10.Jm , 76.60.−k , 76.90.+d (all )
B.S. Dumesh “Influence of quantum fluctuations on the magnetic properties of quasi-one-dimensional triangular antiferromagnets ” 43 365–380 (2000)
75.25.+z , 75.30.Cr , 76.60.-d (all )
A.V. Stepanov, Yu.M. Tsipenyuk “Semiclassical approach to nuclear gamma resonance in crystals ” 43 79–87 (2000)
76.20.+q , 76.60.−k , 76.80.+y , 76.90.+d (all )
V.S. Grechishkin, N.Ya. Sinyavskii “New technologies: nuclear quadrupole resonance as an explosive and narcotic detection technique ” 40 393–406 (1997)
76.60.−k , 76.60.Gv , 76.70.Fz , 81.70.−q (all )
V.S. Grechishkin, A.A. Shpilevoi “Indirect methods for studying nuclear quadrupole interactions in solids ” 39 713–725 (1996)
76.60.−k , 76.60.Gv , 76.70.Fz (all )
B.V. Vasil’ev, V.L. Lyuboshits “Virial theorem and some properties of the electron gas in metals ” 37 345–351 (1994)
71.45.−d , 72.15.Eb , 62.20.Dc , 73.30.+y (all )
B.V. Vasil’ev, M.I. Kaganov, V.L. Lyuboshits “State of the conduction electrons and the work function of a metal ” 37 353–356 (1994)
71.25.Pi, 72.15.Eb , 73.30.+y (all )
R.A. Suris, V.Ya. Frenkel’ “Ya I Frenkel’s studies of the theory of the electric conductivity of metals ” 37 357–373 (1994)
72.15.Eb , 01.60.+q (all )
A.I. Morozov, A.S. Sigov “Transport phenomena in metals with quantum defects ” 37 229–245 (1994)
72.15.Eb , 74.70.Ad , 61.72.Bb , 72.10.Fk (all )
P.L. Kapitza “Experimental research in strong magnetic fields ” 36 (4) 288–294 (1993)
75.60.Ej , 75.30.Cr , 75.80.+q , 71.70.Ej , 75.50.Bb (all )
A.K. Zvezdin, A.F. Popkov, M.V. Chetkin “Dynamics of solitons in a domain wall in a ferromagnet ” 35 (12) 1080–1082 (1992)
01.10.Fv , 75.60.Ch , 75.50.−y , 75.30.Gw , 75.60.Ej (all )
A.D. Gul’ko, F.S. Dzheparov et al “Yurii Georgievich Abov (on his seventieth birthday) ” 35 (11) 997–998 (1992)
01.60.+q , 29.30.Hs , 28.50.Dr , 21.10.Hw , 61.72.−y , 76.60.−k (all )
V.I. Vysotskii, R.N. Kuz’min “Channeling of neutral particles and photons in crystals ” 35 (9) 725–746 (1992)
61.85.+p , 75.30.Ds , 75.60.Ch , 76.80.+y (all )
G.S. Kandaurova, N.I. Vlasova et al “Cooperative domain structures in highly anisotropic alloys with twinned microstructure ” 35 (5) 420–438 (1992)
75.60.Ch , 75.50.Bb , 75.60.Ej (all )
V.D. Buchel’nikov, A.N. Vasil’ev “Electromagnetic generation of ultrasound in ferromagnets ” 35 (3) 192–211 (1992)
75.80.+q , 75.30.Kz , 75.50.−y , 75.30.Gw , 75.30.Et , 75.60.Ch (all )
A.F. Andreev, A.S. Borovik-Romanov et al “Igor’ Ekhiel’evich Dzyaloshinskii (on his sixtieth birthday) ” 35 (1) 49–49 (1992)
01.60.+q , 75.30.Cr , 75.25.+z , 75.50.Lk (all )
Yu.G. Abov, A.D. Gul’ko et al “Beta-NMR spectroscopy and investigations of random walks in disordered systems ” 34 (7) 630–632 (1991)
76.60.−k
V.M. Batenin, F.V. Bunkin et al “Sergei Vladimirovich Lebedev (Obituary) ” 34 (3) 278–279 (1991)
01.60.+q , 79.40.+z , 52.80.Qj , 72.15.Cz , 72.15.Eb , 64.70.Dv (all )
A.V. Kessenikh, R.Z. Sagdeev, G.V. Skrotskii “International School on Magnetic Resonance ” 32 183–185 (1989)
01.30.Cc , 76.60.−k , 76.30.−v (all )
V.G. Bar’yakhtar, A.N. Bogdanov, D.A. Yablonskii “The physics of magnetic domains ” 31 810–835 (1988)
75.60.Ch , 75.10.−b , 75.30.Kz , 75.50.Ee (all )
V.I. Anisimov, V.P. Antropov et al “Band theory of magnetism in metals and alloys ” 31 773–775 (1988)
75.10.Lp , 71.20.Be , 75.50.Ee , 75.50.Bb , 75.50.Cc , 75.30.Cr (all )
L.N. Kryzhanovskii “On the 250th anniversary of the discovery of electrical conductivity ” 31 456–458 (1988)
01.30.−y , 74.25.Fy , 72.15.Eb (all )
A.L. Buchachenko “Magnetic properties of free radicals ” 31 487–488 (1988)
75.30.Et , 75.20.−g , 76.30.Rn , 76.70.Dx , 75.30.Cr (all )
Yu.A. Uspenskii “Magnetic properties of 3d-, 4d-, and 5d-elements and their alloys and compounds ” 31 488–489 (1988)
75.30.Cr , 75.30.Kz , 75.30.Gw , 75.25.+z , 75.80.+q (all )
V.I. Antropov, V.G. Vaks et al “Effect of proximity of the Fermi level to singular points in the band structure on the kinetic and lattice properties of metals and alloys ” 31 278–280 (1988)
71.20.−b , 72.15.Eb , 65.40.De , 62.20.Dc , 71.15.−m (all )
Yu.P. Irkhin “Electron structure of the 4f shells and magnetism of rare-earth metals ” 31 163–170 (1988)
71.20.Eh , 75.30.Gw , 75.30.Kz , 75.30.Cr (all )
K.G. Gurtovoi, R.Z. Levitin “Magnetism of actinides and their compounds ” 30 827–850 (1987)
71.20.Gj , 75.30.Cr , 75.40.−s , 75.30.Kz , 75.25.+z , 75.80.+q (all )
E.B. Aleksandrov, V.S. Zapasskii “Magnetic resonance in the noise in the intensity of scattered light ” 30 916–917 (1987)
76.60.−k , 76.30.−v (all )
V.E. Antonov, I.T. Belash, E.G. Ponyatovskii “Hydrides: investigations under high hydrogen pressures ” 29 1068–1069 (1986)
62.50.+p , 75.30.Cr , 75.30.Kz , 74.62.Fj (all )
V.F. Kovalenko, E.L. Nagaev “Photoinduced magnetism ” 29 297–321 (1986)
75.30.Et , 75.30.Gw , 75.60.Ej , 75.60.Ch , 75.30.Kz , 75.50.Dd (all )
R.O. Zaitsev, E.V. Kuz’min, S.G. Ovchinnikov “Fundamental ideas on metal-dielectric transitions in 3d-metal compounds ” 29 322–342 (1986)
71.30.+h , 71.20.Ps , 75.30.Kz , 75.30.Cr , 71.45.Lr , 71.10.Fd (all )
E.P. Bashkin “Spin waves and quantum collective phenomena in Boltzmann gases ” 29 238–259 (1986)
75.30.Ds , 75.30.Cr , 67.57.Hi , 67.57.Jj , 76.30.−v , 75.80.+q (all )
I.K. Yanson “Nonequilibrium electrons and phonons in microcontracts ” 29 292–293 (1986)
72.15.Qm , 63.20.Kr , 72.15.Eb (all )
A.F. Andreev, A.S. Borovik-Romanov et al “Evgenii Mikhailovich Lifshitz (Obituary) ” 29 294–295 (1986)
01.60.+q , 75.30.Cr , 75.60.Ch , 64.60.−i , 77.22.Ch (all )
Yu.M. Bunkov “NMR of rotating superfluid 3 He. ” 28 842–843 (1985)
67.57.Fg , 76.60.−k (all )
V.G. Bar’yakhtar, B.A. Ivanov, M.V. Chetkin “Dynamics of domain walls in weak ferromagnets ” 28 563–588 (1985)
75.60.Ch , 75.40.Gb , 75.50.−y , 78.20.Ls , 75.25.+z , 63.20.−e (all )
A.V. Zalesskii “Domain walls in magnetic materials according to NMR spectroscopy ” 28 638–639 (1985)
75.60.Ch , 76.60.−k (all )
L.M. Dedukh, V.I. Nikitenko, É.B. Sonin “Dynamics of Bloch lines in a domian wall ” 28 100–101 (1985)
75.60.Ch , 75.25.+z , 75.50.Gg , 75.70.Kw (all )
K.P. Belov, S.V. Vonsovskii et al “Konstantin Mikhailovich Polivanov (Obituary) ” 28 111–112 (1985)
01.60.+q , 75.60.Ch , 75.30.Cr , 75.60.Ej , 75.50.−y , 75.70.Rf (all )
Yu.M. Bunkov, G.E. Gurgenishvili et al “NMR spectroscopy of rotating superfluid 3 He (Soviet-Finnish Project ROTA Research) ” 27 731–747 (1984)
67.57.Fg , 76.60.−k (all )
Yu.S. Barash, V.L. Ginzburg “Some problems in the theory of van der Waals forces ” 27 467–491 (1984)
34.30.+h , 34.20.Gj , 32.10.Dk , 75.30.Cr , 77.22.Ch , 68.43.Mn (all )
B.A. Volkov, A.A. Gorbatsevich, Yu.V. Kopaev “Anomalous diamagnetic properties of systems with spontaneous current ” 27 464–465 (1984)
75.20.Ck , 75.30.Cr , 75.50.Ee , 75.80.+q (all )
A.S. Borovik-Romanov, Yu.M. Bunkov et al “The spin echo in systems with a coupled electron-nuclear precession ” 27 235–255 (1984)
76.60.Lz , 75.60.Ch , 75.60.Ej , 75.50.Ee , 76.50.+g (all )
Yu.P. Gaidukov “Electronic properties of whiskers ” 27 256–272 (1984)
72.15.Lh , 72.30.+q , 68.49.Jk , 72.15.Eb (all )
A.M. Ignatov, A.A. Rukhadze “Ambiguity in the definition of the magnetic permeability of material media ” 24 795–797 (1981)
75.30.Cr
R.N. Gurzhi, A.I. Kopeliovich “Low-temperature electrical conductivity of pure metals ” 24 17–41 (1981)
72.10.Di , 72.15.Eb , 72.15.Gd , 71.38.+i (all )
V.A. Ignatchenko, V.P. Tsifrinovich “Resonance phenomena in the region of overlap between NMR and ESR ” 24 42–56 (1981)
76.30.−v , 76.60.−k , 07.58.+g (all )
V.N. Dudorov, V.V. Randoshkin, R.V. Telesnin “Synthesis and physical properties of single-crystal films of rare-earth iron garnets ” 20 505–527 (1977)
68.55.+b, 75.70.−i , 78.65.Jd, 75.30.Cr (all )
O.S. Kolotov, V.A. Pogozhev, R.V. Telesnin “Pulsed remagnetization of thin magnetic films ” 17 528–541 (1975)
75.60.Ej , 75.70.Ak , 75.60.Ch (all )
N.E. Alekseevskii, A.A. Slutskin “Magnetic Breakdown in Metals ” 17 611–612 (1975)
01.10.Fv , 71.18.+y , 75.47.Np , 75.30.Cr , 75.45.+j (all )
V.A. Atsarkin “Achievements and Current, Problems of Solid-State Radiospectroscopy ” 16 747–749 (1974)
76.60.−k , 76.30.−v , 76.70.Dx (all )
É.V. Galoshina “Magnetic susceptibility of d -band transition metals that are not magnetically ordered ” 17 345–355 (1974)
75.30.Cr , 75.50.Cc , 75.50.Ee , 75.30.Gw (all )
G.A. Smolenskii “Phase Transitions in Certain Magnetically Ordered and Ferroelectric Crystals ” 17 446–446 (1974)
77.80.Bh , 75.30.Kz , 75.50.Gg , 77.84.Dy , 75.30.Cr (all )
M.I. Shliomis “Magnetic fluids ” 17 153–169 (1974)
75.60.Ej , 75.50.Mm , 75.30.Kz , 75.30.Gw , 75.50.Tt , 75.30.Cr (all )
V.I. Pustovoit “Effects Connected with Phonon Production in Semiconductors ” 15 832–833 (1973)
63.20.−e , 72.50.+b , 75.30.Cr , 72.20.My (all )
G.A. Smolenskii “A Magnetic Memory for Future Generations of Electronic Computers ” 15 843–844 (1973)
85.70.Li , 75.60.Ch , 78.20.Ls , 75.30.Cr , 75.60.Ej (all )
N.N. Sirota “Electron and Spin Density Distribution and the Physical Properties of Crystals ” 15 851–852 (1973)
61.66.Fn , 61.10.Eq , 61.50.Ah , 75.30.Kz , 65.40.Gr , 75.30.Cr (all )
I.A. Privorotskii “Thermodynamic theory of ferromagnetic domains ” 15 555–574 (1973)
75.60.Ch , 75.60.Ej , 75.30.Gw , 65.40.Gr (all )
K.A. Valiev, E.N. Ivanov “Rotational Brownian motion ” 16 1–16 (1973)
66.10.Cb , 78.20.Bh , 78.35.+c , 76.60.−k , 77.22.Gm (all )
G.S. Krinchik “The Optics of Ferromagnets ” 14 534–535 (1972)
78.20.Ls , 71.20.Be , 71.70.Ej , 75.30.Cr , 75.50.Cc (all )
E.I. Kondorskii, T.I. Kostina, L.N. Ékonomova “Investigation of the Electrical and Magnetic Properties of Chromium Single Crystals ” 15 369–369 (1972)
72.15.Eb , 75.80.+q , 75.60.Ej (all )
R.F. Arutyunyan, M.L. Ter-Mikhaelyan “The Radiation of Charged Particles in Inhomogeneous Media and its Applications ” 15 369–371 (1972)
72.15.Eb , 72.15.Jf , 75.60.Ej , 75.60.Ch (all )
V.I. Petrov, G.V. Spivak, O.P. Pavlyuchenko “Electron microscopy of the magnetic structure of thin films ” 15 66–94 (1972)
75.25.+z , 75.70.Ak , 68.37.Lp , 75.60.Ch , 75.60.Ej (all )
V.I. Petrov, G.V. Spivak, O.P. Pavlyuchenko “Electron microscopy of magnetic structures of bulky objects ” 13 766–777 (1971)
75.25.+z , 75.60.Ch , 68.37.−d (all )
U.Kh. Kopvillem, V.A. Golenishchev-Kutuzov, N.A. Shamukov “Acoustomagnetic Double Resonances ” 13 828–829 (1971)
76.60.−k , 76.70.Dx , 76.70.Fz (all )
E.A. Turov “Certain Problems of Modern Theory of Magnetism ” 13 671–672 (1971)
76.60.−k , 72.15.Eb , 75.60.Ch , 75.30.Cr (all )
G.A. Smolenskii, R.V. Pisarev, I.G. Sinii “Investigation of Magnetooptic Phenomena in Ferro- and Antiferromagnets ” 12 695–695 (1970)
78.20.Ls , 75.60.Ej , 75.50.Ee , 75.30.Cr (all )
M.Ya. Azbel’ “Problems of the electron theory of metals IV. thermodynamic and kinetic properties of metals in a Magnetic field ” 12 507–533 (1970)
75.30.Kz , 75.40.Cx , 75.60.Ch , 72.30.+q , 72.15.Gd (all )
L.A. Artsimovich, M.A. Lavrent’ev et al “LEONID VASIL’EVICH KIRENSKII (OBITUARY) ” 13 419–420 (1970)
01.60.+q , 75.60.Ch , 75.30.Gw , 75.60.Jk , 75.50.Gg , 75.50.Cc (all )
G.R. Khutsishvili “Spin diffusion and nuclear magnetic relaxation in a crystal containing a magnetic impurity ” 11 802–815 (1969)
75.40.Gb , 76.60.−k , 75.30.Hx (all )
I.A. Privorotskii “Experimental investigation of magnetic domains in non-ferromagnetic metals ” 12 300–301 (1969)
75.60.Ch , 75.60.Ej , 75.50.Dd (all )
R.N. Gurzhi “Hydrodynamic effects in solids at low temperature ” 11 255–270 (1968)
72.15.Eb , 63.20.Ry , 63.20.Kr (all )
L.A. Fal’kovskii “Physical properties of bismuth ” 11 1–21 (1968)
62.20.Fe , 65.40.Ba , 75.30.Cr , 72.15.Eb , 78.30.Er (all )
S.V. Vonsovskii “The physics of magnetic materials ” 9 874–887 (1967)
75.30.Cr , 75.25.+z , 76.80.+y , 75.20.−g (all )
V.S. Khristosenko, A.A. Nedel’ko “Study of the properties of ferromagnetic films in a special physics laboratory course ” 10 405–408 (1967)
01.50.Qb , 01.50.Pa , 75.70.Ak , 75.60.Ch , 75.60.Ej (all )
V.S. Grechishkin, N.E. Ainbinder “Radiospectroscopy of organic semiconductors ” 10 237–255 (1967)
71.35.−y , 76.30.−v , 76.60.−k (all )
V.G. Levich “Concerning a sensational effect ” 9 316–317 (1966)
65.20.+w , 75.30.Cr (all )
M.M. Farztdinov “Structure of antiferromagnets ” 7 855–876 (1965)
75.25.+z , 75.60.Ch , 75.50.Ee , 61.72.Mm , 75.60.Ej (all )
S.V. Vonsovskii, Yu.A. Izyumov “Electron theory of transition metals, II ” 5 723–752 (1963)
75.30.Et , 75.30.Ds , 75.50.Cc , 75.50.Ee , 72.15.Eb (all )
S.V. Vonsovskii, Yu.A. Izyumov “Electron theory of transition metals. I ” 5 547–593 (1963)
71.20.Be , 72.15.Eb , 75.30.Ds , 75.30.Et , 75.50.Cc , 75.50.Ee (all )
N.M. Aleksandrov, F.I. Skripov “Structural investigations in crystals by the method of nuclear magnetic resonance ” 4 947–974 (1962)
61.50.Ah , 76.60.−k , 61.66.−f , 61.50.Lt (all )
E.M. Nadgornyĭ “The properties of whiskers ” 5 462–477 (1962)
68.70.+w , 81.40.Jj , 81.40.Lm , 61.72.Hh , 75.60.Ch , 79.70.+q (all )
I.E. Tamm “Yakov Il’ich Frenkel ” 5 173–194 (1962)
01.60.+q , 72.15.Eb (all )
S.V. Vonsovskii “Magnetism and electrical conductivity of metals ” 5 219–238 (1962)
72.15.Eb , 75.30.Ds , 75.30.Cr , 71.18.+y , 72.15.Lh , 71.45.−d (all )
G.S. Zhdanov, R.P. Ozerov “Neutron diffraction study of magnetic materials ” 5 104–128 (1962)
75.25.+z , 75.30.Cr , 75.30.Ds (all )
A.I. Akhiezer, V.G. Bar’yakhtar, M.I. Kaganov “Spin waves in ferromagnets and antiferromagnets. II Interaction of spin waves with one another and with lattice vibrations; relaxation and kinetic processes ” 3 661–676 (1961)
75.30.Ds , 63.20.Kr , 75.50.Ee , 75.30.Cr , 75.60.Ej , 66.70.+f (all )
A.I. Akhiezer, V.G. Bar’yakhtar, M.I. Kaganov “Spin waves in ferromagnets and antiferromagnets. I ” 3 567–592 (1961)
75.30.Ds , 75.50.Ee , 76.50.+g , 75.80.+q , 72.30.+q , 75.30.Cr (all )
R.I. Garber, I.A. Gindin “The physical properties of metals of high purity ” 4 405–424 (1961)
72.15.Eb , 62.20.Fe , 62.20.Dc , 81.40.Lm , 81.40.Jj (all )
G.R. Khutsishvili “The Overhauser effect and related phenomena ” 3 285–319 (1960)
76.30.Mi , 76.30.Rn , 71.70.Ej , 75.30.Cr , 76.70.Fz , 61.72.Ji (all )
R. Chentsov “Fifth all-union conference on low-temperature physics ” 2 329–336 (1959)
01.10.Fv , 74.20.−z , 67.40.−w , 72.15.Gd , 75.30.Cr , 75.50.Ee (all )
K.P. Belov, M.A. Zaitseva “New magnetic materials — garnet ferrites ” 1 62–64 (1958)
75.50.Gg , 76.50.+g , 75.60.Ej , 75.30.Cr , 61.50.Nw (all )