Preface ....................................................... vii
Introduction ................................................... xv
I. Electron Paramagnetic Resonance ............................ 1
IA. EPR of Transition-Metal Ions in SrTiO3 ................ 1
IA1. Paramagnetische Resonanz von Fe3+ in SrTiO3-
Einkristallen (thesis, originally in German,
translated into English), K.A. Müller, Helv.
Phys. Acta 31, 173-204 (1958) ................... 3
IA2. Electron paramagnetic resonance of manganese
IV in SrТiO3, K.A. Müller, Phys. Rev. Lett. 2,
341-343 (1959) ................................. 30
IA3. Resonance paramagnetique du Cr3+ dans des
monocristaux de SrТiO3, K.A. Müller, Arch.
Sci. (Genève) 11, 150-152 (1958) ............... 33
IA4. Photochromic Fe5+ (3d3) in SrTiO3, evidence
from paramagnetic resonance, K.A. Müller,
Th. von Waldkirch, W. Berlinger and
B.W. Faughnan, Solid State Commun. 9, 1097-
1101 (1971) .................................... 36
IA5. Paramagnetic resonance and optical absorption
of Co4+ in SrTiO3, K.W. Blazey and
K.A. Müller, J. Phys. C: Solid State
Phys. 16, 5491-5502 (1983) ..................... 41
1А6. Paramagnetic Ru5+ and Ru3+ centers in TiO2:Ru,
K.W. Blazey, K.A. Müller, W. Berlinger,
P. Triggs and F. Levy, Solid State Commun. 54,
1039-1041 (1985) ............................... 53
IA7. V2+ in SrTiO3: An extreme double acceptor,
K.A. Müller, M. Aguilar, W. Berlinger and
K.W. Blazey, J. Phys.: Condens. Matter 2,
2735-2741 (1990) ............................... 56
IB. Hyperfine and Superhyperfine Interactions ............ 63
IB1. Paramagnetic resonance of Cr3+ in the layer
structure of NaInS2, K.A. Müller and W.
Berlinger, Phys. Rev. 175, 503-511 (1968) ...... 64
IB2. Covalency and hyperfine structure constant A
of iron group impurities in crystals, E.
Simanek and K.A. Müller, J. Phys. Chem.
Solids 31, 1027-1040 (1970) .................... 73
IС. Unusual Phenomena in the Linewidth and Defect
Centers .............................................. 87
IC1. The temperature dependence of the linewidth
of iron group ions in MgO, A.M. Stoneham,
K.A. Müller and W. Berlinger, Solid State
Commun. 10, 1005-1008 (1972) ................... 88
IC2. Defects in neutron-irradiated strontium
titanate: Ti3+ "off center" on a Sr2+ site,
O.F. Schirmer and K.A. Müller, Phys. Rev.
В7, 2986-2995 (1973) ........................... 92
IC3. Holes trapped near Mg2+ and Al3+ impurities
in SrТiO3, O.F. Schirmer, W. Berlinger and
K.A. Müller, Solid State Commun. 18,
1505-1508 (1976) .............................. 102
IC4. Electron paramagnetic resonance of
photochromic Fe2+O- in SrТiO3, Th.W. Kool
and M. Glasbeek, J. Phys.: Condens. Matter
5, 361-370 (1993) ............................. 106
IC5. O- holes associated with alkali acceptors in
BaTiO3, Т. Varnhorst, O.F. Schirmer,
H. Kröse, R. Scharfschwerdt and Th.W. Kool,
Phys. Rev. В53, 116-125 (1996) ................ 116
1C6. Characterization of particle orientations in
ceramics by electron paramagnetic resonance,
F. Mehran, K.A. Müller, W.J. Fitzpatrick,
W. Berlinger and M.S. Fung, J. Am. Ceram.
Soc. 64, C129-C130 (1981) ..................... 126
II. Transition-Metal Ions in Pyramidal Oxygen Coordination ... 129
IIA. The Observation of Me-VO Centers .................... 129
IIA1. Strong axial electron paramagnetic resonance
spectrum of Fe3+ in SrTiO3 due to nearest-
neighbor charge compensation,
E.S. Kirkpatrick, K.A. Müller and
R.S. Rubins, Phys. Rev. 135, A86-A90 (1964) ... 131
IIA2. Analysis of the Fe3+-VO center in the
tetragonal phase of SrTiO3, Th. von
Waldkirch, K.A. Müller and W. Berlinger,
Phys. Rev. В 5, 4324-4334 (1972) .............. 136
IIА3. Observation of two charged states of
a nickel-oxygen vacancy pair in SrTiO3 by
paramagnetic resonance, K.A. Müller,
W. Berlinger and R.S. Rubins, Phys. Rev.
186, 361-371 (1969) ........................... 147
IIA4. Electron spin resonance and optical
identification of Fe4+-VO in SrTiO3,
O.F. Schirmer, W. Berlinger and
K.A. Müller, Solid State Commun. 16, 1289-
1292 (1975) ................................... 158
IIA5. Electron paramagnetic resonance of three
manganese centers in reduced SrTiO3,
R.A. Serway, W. Berlinger, K.A. Müller and
R.W. Collins, Phys. Rev. В 16, 4761-4768
(1977) ........................................ 162
IIВ. The Structure of the Me-VO Centers .................. 170
IIB1. Structure of transition-metal-oxygen-vacancy
pair centers, E. Siegel and K.A. Müller,
Phys. Rev. В 19, 109-120 (1979) ............... 171
IIB2. Structure of the Cr3+-VO centers in W03,
K.A. Müller, J. Phys. Soc. Jpn. 55, 719-722
(1986) ........................................ 183
IIB3. Superposition model for sixfold-coordinated
Cr3+ in oxide crystals, K.A. Müller and
W. Berlinger, J. Phys. C: Solid State Phys.
16, 6861-6874 (1983) .......................... 187
IIB4. Oxygen vacancy-transition metal-ion impurity
association in SrTiO3, K.W. Blazey,
J.M. Cabrera and K.A. Müller, Solid State
Commun. 45, 903-906 (1983) .................... 201
IIC. The Axial Gd3+-O2- Center in RbCaF3 .................. 205
IIC1. EPR of the Gd3+-O2- pair as a probe to
establish the phase diagram of [lll]-
stressed RbCaF3, J.Y. Buzaré, W. Berlinger
and K.A. Müller, Proc. of the XXII Congress
Ampère, Zürich, 1984, eds. K.A. Müller,
R. Kind and J. Roos (Zürich Ampère
Committee, 1984), pp. 30-31 ................... 206
III. Photochromism ............................................ 209
III1.Identification of charge-transfer bands by EPR
conversion-rate measurements, K.A. Müller, in
Magnetic Resonance in Condensed Matter - Recent
Developments, eds. R. Blinc and G. Lahajnar
(Ljubljana, 1977), pp. 663-679 ...................... 211
III2.Identification of Fe4+ and Fe5+ charge-transfer
photochromic absorption bands in SrTiO3,
K.W. Blazey, O.F. Schirmer, W. Berlinger and
K.A. Müller, Solid State Commun. 16, 589-592
(1975) .............................................. 228
III3.Photochromism in Ni-doped SrTiO3, P. Koidl,
K.W. Blazey, W. Berlinger and K.A. Müller, Phys.
Rev. В 14, 2703-2708 (1976) ......................... 232
IV. The Jahn-Teller Effect ................................... 239
IV1. Observation of the Jahn-Teller splitting of three-
valent d7 ions via Orbach relaxation, U. Höchli
and K.A. Müller, Phys. Rev. Lett. 12, 730-733
(1964) .............................................. 241
IV2. Jahn-Teller effect in magnetic resonance,
K.A. Müller, in Proc. of the International
Conference on Magnetic Resonance and Relaxation.
XIV Colloque Ampère, Ljubljana, ed. R. Blinc
(North-Holland, 1967), pp. 192-208 .................. 245
IV3. V4+ in SrTiO3: A Jahn-Teller impurity, Th.W. Kool
and M. Glasbeek, Solid State Commun. 32, 1099-1101
(1979) .............................................. 262
IV4. Electric field effects in EPR of the SrTiO3: V4+
Jahn-Teller system, Th.W. Kool and M. Glasbeek,
J. Phys.: Condens. Matter 3, 9747-9755 (1991) ....... 265
IV5. Dynamic Jahn-Teller effect of an impurity in
a spontaneously distorted crystal,
J.C. Slonczewski, K.A. Müller and W. Berlinger,
Phys. Rev. В 1, 3545-3551 (1970) .................... 274
IV6. Conduction states in oxide perovskites: Three
manifestations of Ti3+ Jahn-Teller polarons in
barium titanate, S. Lenjer, O.F. Schirmer,
H. Hesse and Th.W. Kool, Phys. Rev. В 66,
165106-1-12 (2002) .................................. 281
IV7. Jahn-Teller and off-center defects in BaTiO3: Ni+,
Rh2+, Pt3+ and Fe5+ as studied by EPR under
uniaxial stress, Th.W. Kool, S. Lenjer and
O.F. Schirmer, J. Phys.: Condens. Matter. 19,
496214-1-15 (2007) .................................. 293
IV8. Theory of a structural phase transition induced by
the Jahn-Teller effect, H. Thomas and K.A. Müller,
Phys. Rev. Lett. 28, 820-823 (1972) ................. 308
V. Non-Kramers Ions ......................................... 313
V1. Effective-spin Hamiltonian for "non-Kramers"
doublets, K.A. Müller, Phys. Rev. 171, 350-354
(1968) .............................................. 315
"VV Electric-field-modulated resonance lines of
non-Kramers ions, P. Wysling and K.A. Müller,
J. Phys. C: Solid State Phys. 9, 635-645 (1976) ..... 320
VI. Off-Center Ions and a Special Cr3+ Center ................ 331
VIA. Off-Center Ions ..................................... 331
VIA1. An off-center ion near a Ba site in BaTiO3 as
studied by EPR under uniaxial stress,
S. Lehjer, R. Scharfschwerdt, Th.W. Kool and
O.F. Schirmer, Solid State Commun. 116,
133-136 (2000) ................................ 333
VIA2. Tetrahedrally coordinated Cr5+ in SrTiO3,
K.A. Müller, K.W. Blazey and Th.W. Kool,
Solid State Commun. 85, 381-384 (1993) ........ 337
VIA3. Electric field effects in the EPR of
tetrahedrally coordinated Cr5+ in SrTiO3,
Th.W. Kool, H.J. de Jong and M. Glasbeek,
J. Phys.: Condens. Matter. 6, 1571-1576
(1994) ........................................ 341
VIB. A Special Cr3+ Center in SrTiO3 ..................... 347
VIBi. Controlled oxygen vacancies and space
correlation with Cr3+ in SrTiO3, F. La
Mattina, J.G. Bednorz, S.F. Alvarado,
A. Shengelaya, K.A. Müller and H. Keller,
Phys. Rev. В 80, 075122-1-8 (2009) ............ 348
VII. Structural Phase Transitions ............................. 357
VIIA.Methodological Aspects and Experimental
Techniques (Sees. 1.2-1.3) .......................... 357
VIIB.Oxide Ferroelectrics (Sec. 1.4) ..................... 357
VIIC.Antiferrodistortive Transitions (Sec. 1.5) .......... 359
VIID.Experiments on Multicritical Points (Sec. 1.6) ...... 359
VIIE.Order-Disorder Transitions (Sec. 1.7) ............... 361
VIIF.Incommensurate Phases (Sec. 1.8) .................... 362
VII1. K.A. Müller, in Structural Phase
Transitions I, eds. K.A. Müller and
H. Thomas (Springer-Verlag, 1981), pp. 1-8 .... 364
VII2. K.A. Müller and J.C. Fayet, in Structural
Phase Transitions II, eds. K.A. Müller and
H. Thomas (Springer-Verlag, 1991),
pp. 1-82 ...................................... 372
VII3. Order-disorder phenomena in the low-
temperature phase of BaTiO3, G. Völkel and
K.A. Müller, Phys. Rev. В 76, 094105-1-8
(2007) ........................................ 454
VII4. Photochromic Fe5+ in non-cubic local fields
in SrTiO3, Th.W. Kool and M. Glasbeek, Solid
State Commun. 22, 193-197 (1977) .............. 462
VIII.Dipolar and Quantum Paraelectric Behavior ................ 467
VIII1.Dipolar behaviour in KTa0,9Nb0,1O3, R. Kind and
K.A. Müller, Commun. Phys. 1, 223-228 (1976) ...... 470
VIII2.Non-Curie-Weiss behavior in ferroelectric
perovskites, H. Bilz, R. Migoni, G. Meissner and
K.A. Müller, Abstract Booklet, 4th European
Meeting on Ferroelectricity, Portoroz, Yugoslavia
(J. Stefan Institute, Ljubljana, 1979) p. 32 ....... 476
VIII3.SrTiO3: An intrinsic quantum paraelectric below
4 K, K.A. Müller and H. Burkard, Phys. Rev. В
19, 3593-3602 (1979) ............................... 477
VIII4.Sr1-xCaxTiO3: An XY quantum ferroelectric with
transition to randomness, J.G. Bednorz and
K.A. Müller, Phys. Rev. Lett. 52, 2289-2292
(1984) ............................................. 487
VIII5.Domain state properties of the random-field xу-
model system Sr1-xCaxTiO3, W. Kleemann,
F.J. Schäfer, K.A. Müller and J.G. Bednorz,
Ferroelectrics 80, part III, 297-300 (1988) ........ 491
VIII6.Indication for a novel phase in the quantum
paraelectric regime of SrTiO3, K.A. Müller,
W. Berlinger and E. Tosatti, Z. Phys. В - Cond.
Matter. 84, 277-283 (1991) ......................... 495
IX. Electronic Structure of SrTiO3 ........................... 503
IX1. Valance-band splitting of SrTiO3, K.W. Blazey,
M. Aguilar, J.G. Bednorz and K.A. Müller, Phys.
Rev. В27, 5836-5838 (1983) .......................... 504
IX2. Electronic structure of strontium titanate,
B. Reihl, J.G. Bednorz, K.A. Müller, Y. Jugnet,
G. Landgren and J.F. Morar, Phys. Rev. В30,
803-806 (1984) ...................................... 507
X. Experimental Evidence of Fermi Glasses and
Itinerant Polarons ....................................... 511
XA. Fermi Glasses ....................................... 511
XA1. Pauli paramagnetism in a Fermi glass, K.A.
Müller, T. Penney, M.W. Shafer and W.J.
Fitzpatrick, Phys. Rev. Lett. 47, 138-142
(1981) ......................................... 512
XA2. LaBaNiO4: A Fermi glass, A. Schilling,
R. Dell'Amore, J. Karpinski, Z. Bukowski,
M. Medarde, E. Pomjakushina and K.A. Müller,
J. Phys.: Condens. Matter. 21, 015701-1-7
(2009) ......................................... 517
XB. Polarons ............................................ 524
XBi. E.S.R. of BF-4-doped polythiophene, M. Schärli,
H. Kiess, G. Harbeke, W. Berlinger, K.W. Blazey
and K.A. Müller, Synthetic Metals 22, 317-336
(1988) .............................................. 525
XI. Superconductivity ........................................ 545
XI1. Inhomogeneous superconducting transitions in
granular Al, K.A. Müller, M. Pomerantz,
C.M. Knoedler and D. Abraham, Phys. Rev. Lett.
45, 832-835 (1980) .................................. 546
XI2. Possible high Tc superconductivity in the Ba-La-
Cu-O system, J.G. Bednorz and K.A. Müller,
Z. Phys. B - Cond. Matter. 64, 189-193 (1986) ....... 550
XI3. Susceptibility measurements support high-Tc
superconductivity in the Ba-La-Cu-0 system,
J.G. Bednorz, M. Takashige and K.A. Müller,
Europhys. Lett. 3, 379-386 (1987) ................... 555
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