K. Aizu

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Possible Species of “Ferroelastic” Crystals and of Simultaneously Ferroelectric and Ferroelastic Crystals

K. Aizu, 1969 .

Ferroelectrics Having an Irreversible (but Divertible) Spontaneous Polarization Vector

K. Aizu, 1967 .

Possible Species of Ferroelectrics

K. Aizu, 1966 .

Parameter Differentiation of Quantum‐Mechanical Linear Operators

K. Aizu, Keitsiro Aizu, 1963 .

Phenomenological Theory of the Transition Sequence in K2SeO4, Pnam → an Incommensurate Phase → Commensurate Pna21

K. Aizu, 1977 .

Proposals Concerning the Sequence of Phase Transitions in K 2 SeO 4

K. Aizu, 1975 .

Determination of the State Parameters and Formulation of Spontaneous Strain for Ferroelastics

K. Aizu, 1970 .

Hard Vibrational Modes Which Are, or Are Not, Induced to Condense by the Condensation of Soft Modes. Extension of the Concept of Faintness Index for Ferroelectricity and Ferroelasticity

K. Aizu, 1974 .

Ferroelectric and Ferroelastic Phase Transformations in Which the Soft Waves Have a Wavelength Equal to a General Rational Number Times the Lattice Constant

K. Aizu, 1973 .

Possible Species of Ferromagnetic, Ferroelectric, and Ferroelastic Crystals

K. Aizu, 1970 .

General Consideration of Ferroelectrics and Ferroelastics such that the Electric Susceptibility or Elastic Compliance is Temperature Independent in the Prototypic Phase

K. Aizu, 1972 .

Newly Formulated Phenomenological Theory of Incommensurate Transitions in a Substance like NaNO2

K. Aizu, 1982 .

Reversal in Optical Rotatory Power—"Gyroelectric" Crystals and "Hypergyroelectric" Crystals

K. Aizu, 1964 .

Possibility of the Transition from an Incommensurate Phase Having Constant Phase Differences to an Incommensurate Phase Having Varying Phase Differences

K. Aizu, 1985 .

Considerations of Crystals which are "Antiferroelastic" as well as Paraelectric, Ferroelectric, or Antiferroelectric

K. Aizu, 1969 .

Considerations of Partially Ferroelastic and Partially Antiferroelastic Crystals and Partially Ferroelectric and Partially Antiferroelectric Crystals

K. Aizu, 1970 .

Supplement to a Previous Paper on the Mechanism of the Ferroelectric Phase Transformation of (NH4)2Cd2(SO4)3. A Model in Which Ps Arises Perpendicular to the Wave Normal of the Soft Waves

K. Aizu, 1972 .

Conjectured Mechanism of the Phase Transformation of a Peculiar Ferroelectric-Ferroelastic Crystal: (NH4)2Cd2(SO4)3

K. Aizu, 1972 .

Theory of the Induction of Incommensurate Condensations of Hard Modes by an Incommensurate Condensation of the Soft Modes in a Substance like K 2 SeO 4

K. Aizu, 1978 .

An Extraordinary Type of Thermal Behavior of Soft Modes when T→Tc-0. Extraordinary Types, Caused by It, of T Dependence of Electric and Elastic Properties near Tc

K. Aizu, 1977 .

General Considerations of Heterophone Sequences of Transitions

K. Aizu, 1977 .

Possibility that Nonferroelectric Modes Severally of \barnM=∞ may Collectively Produce Ferroelectricity

K. Aizu, 1976 .

General Considerations of Homophone Sequences of Phase Transitions

K. Aizu, 1975 .

The Condensation of Hard Modes Induced by the Condensation of Soft Modes When Both the Soft and Hard Modes are of Nonzero Wavenumber

K. Aizu, 1974 .

Group-Theoretical Interpretation of Faintness Index for Ferroelectricity or Ferroelastictiy. II. Faintness Index of a Ferroic Phase

K. Aizu, 1974 .

Ferroics Whose Faintness Index for Ferroelectricity or Ferroelasticity is Unequal to That of the Soft Vibrational Modes

K. Aizu, 1973 .

A Note on the Condensation of a Mode R Following the Condensation of a Soft Mode Q When R Couples with Q Merely in the Form Q 2 R 2

K. Aizu, 1977 .

A Possible New Type of Simultaneously Incommensurate and Ferroelectric Phases

K. Aizu, 1986 .

A Reducible but Unreduced, Spherical System of Transition Parameters. Unified Phenomenological Theory, by Its Use, of the Rochelle Salt Family Containing Both Zone-Center Ferroelectrics and Zone-Boundary Ferroelectrics

K. Aizu, 1977 .

Interpretations of the Sequence of Transitions in Barium Sodium Niobate, Ba2NaNb5O15

K. Aizu, 1976 .

Second-Order Ferroic State Shifts

K. Aizu, 1973 .

Subkinds of the 22 Kinds of Ferroelectrics, Complexity in the Narrower Sense, and Ferro-Ferroelectric Phase Transformations

K. Aizu, 1966 .

A General and Unified Theory of the Homophone Sequences of Transitions in Which the Soft Modes are Doubly Degenerate

K. Aizu, 1975 .

Electrical, Mechanical and Electromechanical Orders of State Shifts in Nonmagnetic Ferroic Crystals

K. Aizu, 1972 .

Ferroelectricity and Polarization-Wave Condensation in Twofold Incommensurate Phases

K. Aizu, 1986 .

Another Pattern of Incommensurate Modulation in a Substance like Ammonium Rochelle Salt. Its Relationship to Incommensurate Ferroelectricity

K. Aizu, 1979 .

Theory of Incommensurate Phase Transitions when Two Equivalent Directions of Modulation Exist in the Prototype and the Unmodulated Soft Modes are of a Nonzero Wavenumber

K. Aizu, 1978 .

Theory of Possible Incommensurate Phases, Their Ferroelectricity and Their Effect on the Real Commensurate Transition in Ammonium Rochelle Salt

K. Aizu, 1978 .

Relationship of the Degree of Isotropy of the Thermodynamic Potential Function to the Catastrophe Indices of the Soft Modes when T→Tc–0

K. Aizu, 1977 .

If an Incommensurate Phase is Possible, can Never the Transition from the Prototypic to a Commensurate Ferroic Phase be Second Order?

K. Aizu, 1977 .

Theory on the Possibility of Incommensurate Modulation along an Axis Perpendicular to the x Axis in K 2 SeO 4

K. Aizu, 1977 .

Thermodynamical Theory of Equisymmetric Ferroic-to-Ferroic Transitions

K. Aizu, 1985 .

Evaluation of the Faintness Indices for All of the Zero-Wavenumber Vibrational Modes Whose Oversoftening Causes Ferroelectricity or Ferroelasticity

K. Aizu, 1973 .

Presentation and Discussion of Examples of Ferroelectrics and Ferroelastics Having the Index of Faintness Unequal to the Cell Multiplicity

K. Aizu, 1972 .

Phenomenological lattice-dynamical theory of ferroelasticity

K. Aizu, 1971 .

Theoretical Determination of the Orders of the Ferroelectric Phase Transitions

K. Aizu, 1965 .

The Pedigrees for Homophone Sequences of Transitions Generated by Zero-Wavenumber Soft Modes

K. Aizu, 1976 .

The Concepts "Prototype" and "Prototypic Phase" : Their Difference and Others

K. Aizu, 1978 .

Inferred Temperature-Dependences of Electrical, Mechanical and Optical Properties of Ferroelectric-Ferroelastic Gd2(MoO4)3

K. Aizu, 1971 .

Inferred Mechanism of the Phase Transformation of a Peculiar Ferroelectric-Ferroelastic Crystal NaNH4 Tartrate

K. Aizu, 1971 .

Fundamentals of Mutual Conversion of Electrical Energy and Mechanical Energy by Simultaneously Ferroelectric and Ferroelastic Crystals

K. Aizu, 1969 .

Comprehensive Tabulation of the Four Categories of Ferroic Point Groups Derived from Each of the 31 Prototype Point Groups

K. Aizu, 1979 .

Different “Subspecies” for Ferroic Phases Derived from a Common Prototype and Belonging to the Same Species

K. Aizu, 1976 .

Polarization, Pyroelectricity, and Ferroelectricity of Ionic Crystals

K. Aizu, 1962 .