'only for students' is correct and usable in written English.
You can use it to emphasize that something is exclusive to students. For example: "This event is only for students."
Only for students majoring in mathematics.
Teaching moments, after all, are not only for students.
Are trips abroad only for students with wealthy parents?
In-library use only for students and staff.
Its teacher handbook indicated that failing grades were only for students who never went to class.
While the school says lectures are only for students, the mosque is open to all Muslims.
Private tutors are usually only for students who genuinely need the extra help.
Some materials may be appropriate only for students with more advanced interpretive skills.
"We have the Orange bar, which is only for students," adds Gemma.
The partnerships led to support and new opportunities not only for students but also for their parents.
This policy has broken barriers not only for students of color but also for schoolchildren from rural communities.
