My current research interests center around low temperature magnetism,
especially solids which exhibit magnetic order due to the magnetic
dipole interaction (rather than the more familiar exchange
interaction), and magnetic frustration. In the case of the dipolar
magnets, the Hamiltonian for the dipole force is known exactly, so one
can hope to make critical comparisons between experiment and theory.
The conclusions may have implications for our understanding of familiar
exchange-coupled magnets such as ferrites. We have studied the
susceptibility and spontaneous magnetization below 1 K of several axial
materials, including the rare earth ethyl sulfates. These are of
interest because some of them provide very good laboratory examples of
the Ising model, but with dipolar interactions. We have also studied
two classes of cubic dipolar ferromagnets: the Cs2Na(RE)(NO2)6
and Cs2Na(RE)Cl6 compounds. These form for the
whole series of rare earth (RE) elements, and have a magnetic order
which is determined by lattice symmetry alone. In contrast, the rare
earth phosphomolybdates or (RE)PO4(MoO3)12.30H20
form another cubic system, this time with diamond symmetry, which we
find to be dipolar antiferromagnets with very large, macroscopically
observable quantum spin fluctuations. The difference with the cubic
ferromagnets is due purely to symmetry. These compounds are the first
to show spin fluctuations directly in the susceptibility. Most recently
we have studied the cubic K(RE)3F10 compounds,
some of which contain three mutually orthogonal Ising lattices of
magnetic ions. Despite the presence of antiferromagnetic exchange, and
dipole-dipole interactions which favor antiferromagnetism, several of
them are ferromagnets
- Linton R. Corruccini
- Ph. D. - Cornell University, 1972
- Experimental low-temperature and condensed matter physics; liquid
A second area of investigation is magnetic frustration. This
phenomenon occurs when an exchange-coupled magnetic ion cannot satisfy
all of its magnetic bounds, and hence does not know what direction to
point (it is "frustrated"). This effect plays an important part in the
behavior of spin glasses, but also occurs in certain materials which
have long range crystalline order. We have studied several of the rare
earth pyrochlore materials, many of which are highly frustrated. By
studying the magnetic and thermal properties of these materials, we
hope to find out whether they ultimately order magnetically at
sufficiently low temperatures, and if so, whether the order is
long-range or glassy.
In both these areas of research a 3He-4He
dilution refrigerator cools samples down to 7 mK absolute. Magnetic
properties are measured using special low temperature fluxgate
magnetometers, and also a SQUID magnetometer. We have semi-adiabatic
calorimeters to measure thermal properties, one for dilution
refrigerator temperatures, and a second for the range 0.5 K to 30 K.
The crystal structure of new sample materials is characterized using an
automated powder x-ray diffractometer with a 10 K cold stage.
Honors and Awards
Linton R. Corruccini
- Visiting Member, Technical Staff, AT&T Bell Labs, 1980, 1983,
- Fulbright Fellowship, 1976-77
- NSF Graduate Fellowship, Cornell University 1967-71
- AEC Graduate Fellowship, Cornell University 1966-67
- National Merit Scholarship, Swarthmore College, 1962-66
- Sigma Xi
- American Physical Society
- 1990 Xu, Jingchun, M.R. Roser, and L.R. Corruccini. Dipolar
Magnetic Order in the Rare Earth Ethyl Sulfates. Journal of Low
Temperature Physics 78:13.
- 1990 Roser, M.R. and L.R. Corruccini. Magnetic Susceptibilities
of Rare Earth Ions in an Unusual Tetrahedral Site. Physical Review
- 1990 Roser, M.R. and L.R. Corruccini. Dipolar Ferromagnetic
Order in a Cubic System. Physical Review Letters 65:1064.
- 1991 Roser, M.R., Jingchun Xu, and L.R. Corruccini. Magnetic
Order in the Nd, Gd, Er, and Yb Trifluoromethane Sulfonates. Journal of
Low Temperature Physics 85:255.
- 1992 Roser, M.R., Jingchun Xu, Steven J. White, and L.R.
Corruccini. Magnetic Order in Three Rare-Earth Elpasolite Compounds Cs2NaRCl6.
Physical Review B45:12337.
- 1993 Corruccini, L.R. and Steven J. White. Dipolar
Antiferromagnetism in the Spin Wave Approximation. Physical Review
- 1993 White, S.J., M.R.Roser, J. Xu, J.T. van der Noordaa, and
L.R. Corruccini. Dipolar Magnetic Order with Large Quantum Spin
Fluctuations in a Diamond Lattice. Physical Review Letters 71:3553.
- 1994 Corruccini, L.R., Steven J. White, and M.R. Roser. Dipolar
Magnetism in a Diamond Lattice: Direct Observation of Zero Point Motion
Effects. Physica B194-196:281.
- 1994 White, Steven J. and L.R. Corruccini. Low Temperature
Properties of the Cubic K5R[Ni(NO2)6]2
Compounds. Physica B194-196:283.
- 1995 Tang, J., K.A. Gschneidner, Jr., S.J. White, M.R. Roser,
T.J. Goodwin, and L.R. Corruccini. Ce5Ni6In11:
An Intermediate Heavy-Fermion System. Physical Review B52:7328.
- 1996 White, Steven J., Stephen Chamberlain, and L.R. Corruccini.
Properties of the Cubic Hexanitromanganate Salts. Journal of Physics
and Chemistry of Solids 57:1821.
- 1997 Chamberlain, Stephen and L.R. Corruccini. Magnetic
Properties of Ti, Cr, and Fe Fluoride Garnets. Journal of Physics and
Chemistry of Solids 58:899.
- 1997 Corruccini, L.R., J.T. van der Noordaa, Steven J. White,
and Hakon Hope. Magnetic Properties of the RPO4(MoO3)12x30H2O)
Compounds, R = Ce, Pr, Nd, Tb, Ho, Tm, and Yb. Physica B 240:43.
- 2000 Corruccini, L.R., and J.T. van der Noordaa. Magnetic
Properties of Rare Earth and Transition Metal Phosphomolybdates.
Journal of Low Temperature Physics 121:81.
- 2001 Luo, Gang, Steven T. Hess, and L. R. Corruccini. Low
Temperature Magnetic Properties of the Geometrically Frustrated
Pyrochlores Tb2Ti2O7, Gd2Ti2O7,
and Gd2Sn2O7. Physics Letters A 291:306.
- 2003 Stephen L. Chamberlain*, Gang Luo, and L. R. Corruccini.
Magnetic Ordering in KDy3F10 , a System
Containing Three Orthogonal Ising Lattices . Physical Review B67,
- 2003 Stephen L. Chamberlain and L. R. Corruccini. Magnetic
Ordering in RbGd3F10 . Journal of Magnetism and Magnetic Materials 264,
- 2004 Gang Luo and L. R. Corruccini. Magnetic Order and
Paramagnetic Resonance in K3Nd2(NO3)9.
Solid State Communications 128: 251.
- 2005 Stephen L. Chamberlain and L. R. Corruccini. Magnetic
Ordering in Rare-Earth Fluorides with KY3F10
Structure and Axial Moments. Physical Review B71:024434.
Return to the home page.